House the homeless, don't warehouse them. Many homeless are on SSI and SSDI and can afford a place for $400/month. I know a case where the housing authority pays $500 and the person pays $300 for an $800 apartment. It would be a lot cheaper for everyone for the housing authority to build passive solar to European PassivHaus standard, with solar heat and hot water, minimal footprint. This can be done cheaper. Rocky Mountain Institute, rmi.org, has can show HUD how to do this.