Where are you finding all those $100k single family homes? The median CA house is $760,800 [1]. (I know there's houses cheaper than the median, but if you are buying up 130k houses, likely more than the entire available stock, you will have to go quite high up the price listing.) At that price, you're talking 17,087 houses. There are 161,548 homeless people in CA [2]
[1] https://worldpopulationreview.com/state-rankings/median-home...
[2] https://www.usich.gov/homelessness-statistics/ca/