I don't have any other source of income. I had a pretty good paying job for the past year and managed to save one year worth of savings. I can survive with what I have until June (I think). I'm doing my best to create something that helps at least a few people, and maybe get some money from that too.
Even if I don't, I have already learned and practiced so much more skills than I could if I had a full time job and that makes it worth it.