Supposedly cities like San Francisco, Sacramento and Stockton have been busing the homeless out for years. Many of them end up in madera, Fresno and especially Merced. I've heard it a few times from staff at the welfare office in Merced County that do intake applications. The way the story goes, these other cities either pay for the bus/train ticket one way to Merced or recommend they relocate to Merced because the town pays up the cash benefits faster than anyone else around.
Personally I think San Francisco and other bay area towns are the perfect places to build formerly homeless developments. So much opportunity for success and growth for them get off the streets and stay off the streets. To dump those with nothing into a nothing poor community, would be like moving out the poor families from San Francisco to Antioch or something. Plus considerably more tax money able to be raised in short periods of time to help fund it. That's what should of been done with Candlestick park instead of luxury homes.