(1) People support Sanders because what he’s proposing isn’t all that radical. Rooting out corruption, lowering the ratio of average tuition to income, base level of public insurance that works nationally. He’s not a socialist in the sense that he wants to nationalize everything.
(2) People who live in rental SFRs likely see the situation as temporary and don’t want to invest too much in the yard, etc. Also, working hours are pretty bad, especially when both parents are working full-time.