It sounds like you've found several different ways to challenge yourself and grow as a photographer, which is great. But I think if anyone is to make a living creating any form of art, at least until they reach that legendary sort of level, there are bound to be creative compromises that have to be made. Until you get there, I think it's all about gathering as much feedback as possible, and really developing your own style and voice. If you have a product that represents something truly unique and interesting in the photography space, and it might take a little luck and a ton of networking, but I think that's where the money can come in, regardless what niche you find for yourself. Hope this helps, and good luck with your journey.