What do you need these volunteers for? If you can't do something yourself, you have to hire someone to do it for you, however most businesses start off as a one-man shop. Many of those never grow beyond that, they provide the owner a good income and that's it. Many owners may not even have the ambition to grow further, to start having to manage people instead of doing the real work (which they enjoy doing). That accounts for all businesses, including software businesses, this are just businesses where a person is self employed, selling his services directly to the people that need exactly that.
OP doesn't even mention what kind of software he wants to do (other than that he can't write software himself). There's web design, there's database development, there's custom application development. All these things can be done by a single person. I've done just that for my own business: I'm a tour operator and I happen to be pretty computer savvy, so for that my business set up a web site (to promote my tours), an online booking system (accepts credit cards - using PayPal as payment processor), a MySQL database to store all the tours and bookings, a front-end for me to manage tours and bookings. I've designed promotional leaflets and a presentation for use during the tours, explaining geological processes that took place. Besides all that, I'm operating the actual tours, and no way I'd hire someone to do that for me as that's the fun part of the business.
Yet still I'm a one man shop. I haven't hired anyone to do this for me. I haven't even set up a company for that (not legally required as long as I operate using my own name). The only thing that I outsource is stuff that I don't have the equipment for such as the printing of leaflets, and I'm renting a cloud server to run my website on.
What you're thinking of, is far more difficult to make money with. You have to have a unique idea, have to be the first, have to implement it well, have to get the idea out to the people.
On the other hand, there are lots of huge, established markets (such as tourism - what I'm currently involved in) with many businesses providing income for many people. The trick is to get into such a market, and make some of that money flow your way. It usually won't make you super rich, it won't make you a second Google or Facebook, but the chances that you can make some good money in such a market are good, while the chances of making it super rich are very, very, very small. Buying a lot in the lottery gives you a better chance to strike it rich than hoping for a unique product that takes off massively.