I hope it's clear I haven't talked to a food truck person because I lead off my reply literally saying I haven't heh. I used that as an example because the parent comment was talking about a food truck site he made for someone.

I can't force you into believing anything and that's fine but I don't think I need to defend myself here.

I have no agenda. I'm only bothering to share this stuff (along with the 100+ other posts on my blog) because I don't want to see other software developers go through the same mistakes I encountered along the way when freelancing for the last 20 years. I've been burned by marketplaces in the past.

Btw, what I described works (and has worked for me personally) with any of the niches I listed in my original comment and many more. No, I haven't created a super successful SAAS business from any of them but my idea wall has a dozen that could be made and would likely have some degree of success.

The problem is, I'd rather spend my limited time on creating software developer courses and building that up because unless you're passionate about what you do, you're very likely going to go no where in the long term and I'm not passionate about making SAAS apps related to industries I'm not personally involved with on a daily basis.