We don't actually have the technology to build housing on the cheap for the most marginalized people in society, who would trash that housing without intensive and expensive and very often coercive support from some kind of social worker. One of the biggest reasons many homeless people avoid the homeless shelters that do exist for the most distressed people in our society, is because the other most distressed people in our society living in the same shelter are prone to stealing from them or physically harming them. And another reason is that they want to irresponsibly use drugs in a way that makes them a potential threat to others and so is banned by the shelter.