Can someone invest in a single product instead of an entire company?

Short answer: Of course! Many angel groups require you to submit through Gust because it offers a consistency and makes reviewing applications easier. But not all use Gust same as not all use AngelList... I haven't met an angel who frowns upon using multiple platforms. I would encourage you to leverage your twitter and Facebook or Instagram to meet angels and get in their radar (don't hassle or stalk) just try to get exposed a bit to them by being part of the same meetup group, follow the same blog, membership... Subscribe to their own blog.. And when you submit funding request considerations do please send a follow up email or a call or basket of fruits if you have contact them before.

Have you considered crowdfunding? Investment grants will be able to take care of funding but crowdfunding has the benefit of taking care of funding and providing a customer base.There are many examples of teams without a fully working prototype being successful on these platforms. Kickstarter will be off the table but you have some great options with Indiegogo (https://www.indiegogo.com/) and the Brazil specific network Catarse (http://catarse.me/en) Of course, you will have to focus on things like presenting your story and getting attention for a bit but if you are successful you will have money for a prototype, access to a customer base and exposure that could bring some helpful people onto your team - even the angels and VCs you'll need to get to the next level. Message me if you need some help - I'm not personally an expert in crowdfunding but I can connect you with some of the best in the business.

Whoa, start by reading the Lean book again; you're questions suggest you are making a classical mistake made by too many entrepreneurs who live and breath Lean Startup. An MVP is not the least you can show someone to evaluate whether or not building it is a good idea; an MVP is, by it's very definition, the Minimum Viable Product - not less than that. What is the minimum viable version of a professional collaboration network in which users create a professional profile visible to others? A website on which users can register, have a profile, and in some way collaborate with others: via QA, chat, content, etc. No? A minimum viable product is used not to validate if something is a good idea but that you can make it work; that you can acquire users through the means you think viable, you can monetize the business, and that you can learn from the users' experience and optimize that experience by improving the MVP. Now, that doesn't mean you just go build your MVP. I get the point of your question, but we should distinguish where you're at in the business and if you're ready for an MVP or you need to have more conversations with potential users. Worth noting, MOST entrepreneurs are ready to go right to an MVP. It's a bit of a misleading convention to think that entrepreneurs don't have a clue about the industry in which they work and what customers want; that is to say, you shouldn't be an entrepreneur trying to create this professional collaboration network if you don't know the market, have done some homework, talked to peers and friends, have some experience, etc. and already know that people DO want such a thing. Presuming you've done that, what would you present to potential users BEFORE actually building the MVP? For what do you need nothing more than some slides? It's not a trick question, you should show potential users slides and validate that what you intend to build is the best it can be. I call it "coffee shop testing" - build a slide of the homepage and the main screen used by registered users; sit in a coffee shop, and buy coffee for anyone who will give you 15 minutes. Show them the two slides and listen; don't explain, ONLY ask.... - For what is this a website? - Would you sign up for it? Why? - Would you tell your friends? Why? - What would you pay for it? Don't explain ANYTHING. If you have to explain something, verbally, you aren't ready to build your MVP - potential customers don't get it. Keep working with that slide alone until you get enough people who say they will sign up and know, roughly, what people will pay. THEN build your MVP and introduce it first to friends, family, peers, etc. to get your earliest adopters. At some point you're going to explore investors. There is no "ready" as the reaction from investors will entirely depend on who you're talking to, why, how much you need, etc. If you want to talk to investors with only the slides as you need capital to build the MVP, your investors are going to be banks, grants, crowdfunding, incubators, and MAYBE angels (banks are investors?! of course they are, don't think that startups only get money from people with cash to give you for equity). Know that it's VERY hard to raise money at this stage; why would I invest in your idea when all you've done is validate that people probably want it - you haven't built anything. A bank will give you a loan to do that, not many investors will take the risk. Still, know not that your MVP is "ready" but that at THAT stage, you have certain sources of capital with which you could have a conversation. When you build the MVP, those choices change. Now that you have something, don't talk to a bank, but a grant might still be viable. Certainly: angels, crowdfunding, accelerators, and maybe even VCs become interested. The extent to which they are depends on the traction you have relative to THEIR expectations - VCs are likely to want some significant adoption or revenue whereas Angels should be excited for your early adoption and validation and interested in helping you scale.

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.

Ask yourself: -Do you believe in their vision? -Would you leave everything you have to work with them to make their dream come true? -Do you have strong data that tell you that what they say will happen it's true? -Do you think the founders are the best to accomplish what they are going for? -Is it everyone in their team in love with what they are doing? It's important to take in consideration the legal/boring part of investing, but it's not the most important. As betting on horses, there will be only one that wil win (in their space). Are you beating for the right one? Ask yourself that. And stand along your decision