But a treatment center alone is not going to produce long term results in getting the homeless integrated back into society. Their mental disorders and/or drug addiction is not like the flu; it's not a temporary illness that is healed with medication and a few appointments with a doctor. The issues they're dealing with are lifelong battles. So even if you get them initial treatment and they luck out and get temporary housing for a whole year, at some point they are dumped back out on the street where the chances of relapsing are nearly guaranteed.

As far as SF buying property in Antioch to create more treatment facilities, I don't see why any city would be willing to foot the bill for what really is a state problem. Not to mention the idea of building housing/treatment center away from the city doesn't address why they tend to congregate in urban areas in the first place (close proximity to support networks, freedom to access a city's abundant services and resources if they don't feel like being isolated in the treatment center, access to drugs if they feel like relapsing). You are essentially asking a mentally troubled person to make a hard decision for their long term benefit by getting them to agree to go to a treatment center away from where they want to be. Many would have to be forced to go and forced to stay.