Here's a dude who took a year "off" with his family and cranked out an iPhone app.
http://www.npr.org/2013/05/20/183910777/seeing-the-northern-...
http://www.npr.org/2013/05/20/183910777/seeing-the-northern-...
Quite a few people seem to be able to make a living as indie developers. But I wonder how many fail, without making their story public. People like to read about success stories, but not about failures.
If you ever want to meet up and chat, feel free to ping me. I've been doing indie development for ~3 yrs.