Is there a reliable service/SDK that will let me provide an item & location to get fulfillment information?

One thing I like about your question is the fact that you're ASKING it. Trying to quantify profit. Most people never even get that far. They treat profit--especially if it is that of their own business--as some ethereal thing they will "get later" if possible. "To manage we must measure" is a business maxim and a fundamental one for me. If we don't build Profit into our revenue equation, we're unlikely to get any. And so asking this question and building profit right into your revenue target is a powerful idea nearly all small business owners totally miss. As for an answer...that amount is really up to you. What do you need to survive? There are so many variables we don't know about: what kind of business, what scale, what paths to market are you using, etc. etc. that affect costs, together with the price tolerance of your marketplace, that it's not possible to give an "average" answer. When I train business owners on how to set their operation up for success, I recommend 20-30% of revenue be built in as a monthly amount for profit. However, this is usually for consultants, and may not be possible for other business models. Sometimes 5% profit is what's achievable, say for a commodity provider, and if they make money with that, OK. Have you done any studies of comparative firms in your niche?

Your pricing model should hinge on the fact that the perceived value of services should outweigh the cost associated with it. You can consider looking at online marketplaces like Craiglist, Kijiji, Airbnb, etc to understand various types of business models. However, the approach shouldn't be based on what others are doing. Rather, you should understand your niche, values associated with the niche, and adopt appropriate pricing model. Invest your time in designing the business model for your startup, followed with reviewing it vis-a-vis other models. Need help with business model? Feel free to reach out.

Freemium revenue for mobile apps was up 211 percent last year (2013), according to a report from mobile analytics company App Annie and IDC. 83 percent of the top thousand apps on each of the iOS app store and Google Play — monetize via freemium, an even bigger proportion of revenue generated by those top 2,000 apps arrives via freemium: 92 percent. Naturally, the key to success as an app developer who uses the freemium model is getting as large a percentage of your free users buying something as possible. That’s a significant challenge. You have to do what makes the most sense for your app and the users on it. You must create value for the user and make it compelling for them to spend money on whatever you plan on offering. In terms of viable it is tough to say because I don't know what your medical app does. 1. Look at the data from your app 2. Talk to your users about what they want 3. Look at what your competition is doing or others in a similar vertical

Congrats on your steady growth on Twitter and YouTube - that's definitely a good sign that you're on the right track! Sponsorship, brand integration, product placement, reviews, and endorsements are all good ways to make more income with your YouTube videos. Sponsorship would be like a regular, ongoing company that is mentioned at the start and/or end as helping make the video/show possible, brand integration would be making a video based around the company's product or service, product placement would be using the company's product briefly in a video, a review would be sharing your thoughts on the company's product or service, and an endorsement could just be saying at some point that you found a company with a product or service that you like and think your audience would as well. Hope that helps and otherwise if you would like more information on any of those or ways to get companies involved, please feel free to request a call with me!

If it's SaaS, you should be monetizing from day one. An MVP in SaaS is the minimal product that people will pay for, that's the starting point. You evolved the product from there. If it's a consumer app, that's a little more complicated. Often times, monetizing preemptively can stunt growth and kill the trajectory, due to lack of focus, user experience, etc. It's really a question of access to capital in this scenario.