A studio apartment can be over $3,000 in the Bay Area. Meanwhile, there are like five homeless people on every block of the city I lived in with five-digit population. The city would need to find some way to seize land, without calling for a vote, in order to have enough housing for everyone since rent control has been voted against for over a decade.
The main issue is that people would vote to drive the homeless into the sea before they would vote to house them.