> Nobody will pay ever penny to care about zero cost homes.

I'm 100% opposed to this sort of thing being state-funded (I'm an AnCap), but I have to disagree with you here. I've personally subsidized housing for people who I've met that I believed were honestly trying to escape homelessness.

Most people's politics aren't as extreme as my own, but the mere existing of private, non-profit homeless shelters falsifies your idea that no one will help pay for zero cost homes.