Danielle Steel would go round with a team in busses/vans at night giving out packs to the homeless, she funded it all herself
in the packs were sleeping bags, puffy jackets, food rations, toiletries etc.
I dont personally know what its like to live in San Francisco as never been there, but I have read she did this.
In Auckland we have temporary housing and a lot of 'slum' housing is quickly going up, like huge blocks of cheap stuck together houses, we'll soon have our own favelas. Because Auckland is a city with a good climate, i,e no harsh winter, maybe just wet, everyone wants to live here. But rents are rising and its expensive. Most of the 'gated' communities are the newe retirement villages.
The rich liberals have Lifestyle blocks and town houses or holiday homes in the resort towns further away. These often get used as squatting places for P labs if the owners dont keep an eye on it. Theres also landbanking...foreigners and rich people buying up homes for their proerty portfolios.
Real estate agents make a killing in Auckland, land value has sky rocketed.
Public libraries are often a place where homeless peeps hang out.