Need help to understand how far APIs can take it us & what the user experience will actually look like?

Consider instead where a $2500 price point puts you. I use a selling technique called Monetizing The Problem, and in that process I get the prospect to calculate the size of their problem. Then I charge 5-10% of that figure. There's never any resistance, because they see where the number comes from, how it's based on reality--and a number THEY came up with (not me). So here you are at $2500. Let's be conservative and say that's 5% of the size of the problem. Meaning you are trying to help them make $50K in sales over the next year. What kind of a business has a revenue goal of $50K? A sole proprietor who's just trying to get by? Is that your target customer? Really think about this. A serious SME won't play at the $2500 price point, because it's too low. They know the vendor can't commit enough resources to do the job they really need done. For instance a business with only four high-value employees plus the owner needs to bill at least $60K A MONTH to survive!! Why would they let you touch their marketing collateral (that's their website) for a mere $2500?! Stay at $2500 and you're attracting a really low level of client. If you have the horsepower to achieve more with the skills you have, then I highly recommend going after a better class of customer.

It's highly unlikely that you will be able to find competent full-stack mobile developers willing to work with you for equity, but if you do, "fair" compensation would be 50% or more of the equity in the Company. Approaching any developer with just an idea, diminishes your credibility as a potential co-founder. Here's why: If you're non-technical, you must show a "relentless resourcefulness" in moving your idea forward. This means finding the money necessary to get an MVP or even click-able prototype completed to show that while you might not be technical, you have the ability to raise money, and have enough product sense that you can articulate that into a prototype. If you can't raise or spend the relatively small amount of money required to successfully build a prototype, what evidence are you providing that developer that you are going to be able to create value for the business long-term? Full-stack mobile developers (although this is often quite a misnomer) are one of the most in-demand skill-sets of all Silicon Valley companies. That means that you're competing against established companies that can pay top dollar, and still provide meaningful equity incentives as well as recently funded startups who have further along the road in turning their idea into reality. I would suggest that you look at hiring contractors (I know of some great mobile dev shops that are reasonable) to build your first version. Expect to go solo at least until you have some form of early prototype. Then, you're in a much better position to attract a technical co-founder. Happy to talk you through any of this at any point.

It varies and it's very very specific to what you want to develop. The concrete design of your circuit matters. Also prototype building costs are usually a factor 10-100 higher than series. If you already have your prototype then you can shop around various manufacturing companies. To do that, you need Gerber files (your PCB design) and a bill of materials. You also need to think about casing: designing it and creating the mold is expensive. If you don't have your prototype yet, I recommend having it engineered in eastern Europe. Custom engineering is cheap there and high quality. IP protection is a problem. One thing to do is to distribute the work to different manufacturers. For the design phase you are safer if you design your prototype in Europe or the US where international patent laws apply. I could give you more specific advise in a phone call, getting to know a bit better what you are trying to build.

You can only solve a big problem that changes the world if you solve a problem that is deeply personal to you. Two great examples and why they worked: Roy Raymond was a sad pervert. He'd buy bras and panties at the department store and all the clerks thought their thoughts about him. Roy felt embarrassed. He wasn't really a pervert. He just wanted to buy lingerie for his girlfriend. So he solved this major problem he was having. He created a space where men could feel comfortable coming in and buying sexy lingerie for their partners. He called it Victoria's Secret. But Roy, by solving this important personal issue for himself, apparently solved the same issue for many other men. First year sales were over $500,000 and he quickly opened up three more stores. In 1982 he sold Victoria's Secret for one million dollars before trying multiple other businesses that ended up failing. One MILLION Dollars. A decade later Victoria's Secret was worth over a billion dollars but Roy Raymund was nearly bankrupt and had missed the huge run-up in it's value. -- Picture New York City in the late 1800s on a rainy day. It was disgusting beyond belief. 150,000 horses transported people up and down the busy streets. Each of those horses, according to Super Freakonomics, dropped down about 15-30 pounds of manure. That's up to 4.5 million pounds of manure A DAY on the streets of NYC. And now imagine it raining. Would you cross the street? How long could this last? How long would the city survive without being infested with crap and all the diseases brought with it. What would happen as population of both men and horses increased? Was someone working on inventing a gigantic manure scooper? How would this problem get solved? It never got solved. Instead, Henry Ford invented the assembly line to mass produce cars. Every horse lost their job. People began to drive cars. Manure problem solved. -- In both cases there is a common theme. Someone outside the industry solved a problem that was personal to them that then changed an industry forever. Roy Raymund wasn't a fashion designer or a retailer. He worked in the marketing department of Vicks, which makes over the counter medications. Henry Ford, I don't think, ever worked in the manure industry. Instead, each person focused on a problem that was important to them. A problem that excited them at that moment in time. Raymund wanted to avoid being embarrassed in the future. Ford wanted an efficient way to make cars. The ONLY way to change the world is to solve a problem that is important to YOU. They had to choose themselves for success before they could save the world. Raymund had to convince himself that he didn't belong in the marketing department of a division of Procter & Gamble. He borrowed $80,000 and took the big risk of starting a business. Ford had to survive numerous failures and bankruptcies in order to find a cheap way to make cars. He would abandon investors, people who supported him, and even companies named after him, in his quest to solve his problem in his own way. Nobody gave them permission. And neither of them set out to change the world. They only wanted to solve a problem that was personally important to them. It's unfortunate that often we forget that choosing ourselves is not something that happens once. It has to happen every single day. Else we lose track of that core inside of us that solves problems and is able to share them in a way that makes the world a better place. Ford forgot this and became obsessed with Jews. Ford is the only American that Hitler mentions in Mein Kampf: "only a single great man, Ford, [who], to [the Jews'] fury, still maintains full independence...[from] the controlling masters of the producers in a nation of one hundred and twenty millions." And what happened to our embarrassed marketing manager that has ignited the passions of men and women for the past 30 years? Roy Raymund saw the value of Victoria's Secret jump from the one million he sold it for in 1982 to over a billion dollars a decade later. He failed in business after business. He got divorced. Then at the age of 46, my age, he drove to Golden Gate Bridge, jumped off it and killed himself. Before you can save the world you have to save yourself. But you have to relentlessly do it every day. Sometimes the train wakes me up at night and I feel scared. What will the world be like for my children? I won't always be able to help them. I don't even know if I do enough to help them now. And then I remember. I'm alive for another day.

Yes. Who I would recommend would depend on what you'd like to see happen. Are you building only for iOS, or only for Android, or both? Will you have a bunch of content/stuff in your app or just a little? Are you thinking game or non-game app? Do you already have a big fanbase or would you be trying to build one while building the app? It's easy to save a bunch of money on mobile development if you know how, and even easier to overspend. Making an app can be a ton of fun or a major headache. I'd recommend the fun. So if you want an outside perspective, give me a ring.