To have invested your life savings into this app which, uh, is really hard to determine what it does seems silly to me - especially since you have a family to care for.
Slack Meets GitHub Issues? Doesn't Slack already meet GitHub issues in that it integrates with GitHub fine?
The fact that you need a very long blog post to explain exactly what this does should be a warning sign that it's unfocused and released too late.
"It can help you manage everything from todo items to chat messages to blog posts to photos to fully-fledged projects, photo albums and even mini social networks! Really, the type of content you create is completely up to you."
That sounds like a nightmare to me, now I have to invest a lot of time to figure out exactly how this thing works? Start small, focused, make one small thing that does one thing well. Release it quickly, try to get a few people using it (hopefully paying for it) and gather some of their feedback. Find out how they're using it and what their pain points are. Grow from there.
I know you said opportunities where you live are few and far between, and you clearly have the skills, why can't you build a production ready application at an established company?
Finally, I'm being overly critical because I've been in a similar situation before - you spend months building something, release it, and argh! why aren't people coming? It's frustrating, I know, but your skills are better put to use elsewhere.