This might not be appropriate advice for your current situation, but if you think you might face homelessness again, you might think about getting a van at some

This might not be appropriate advice for your current situation, but if you think you might face homelessness again, you might think about getting a van at some point. It will give you the minimum necessary to get through tough times. You'll still need to make enough for gas and some food, but you can live in a van for much less than rent. That, and a gym membership and you can get showers and work out. If you have a decent laptop then you can work in almost any coffee shop for maybe five dollars a day. I'm not saying it a great option, but that it might be the best of a set of bad options. Also, you might think about posting to Craigslist or similar, explain your situation and ask for some work. It certainly won't hurt.