I do it for my day job (and my last few day jobs). I have built a few of my own, but nothing with the intent of making money. The real impediment for me is not

I do it for my day job (and my last few day jobs). I have built a few of my own, but nothing with the intent of making money. The real impediment for me is not the technical side (I can do that myself, and I know enough people in the business to help with gaps in my knowledge) it's more coming up with good ideas. Ideas are cheap, but really good ideas - the ones that make you think "why the hell didn't I think of that" - that light you on fire and push you to do 24 hour non-stop coding sprints because you just want to see them work - are few and far between, and much harder to come up with (at least for myself) than people realize.