Eating is trivial; charities can feed people for <$1000 per day. Living space is also cheap; the only reason you need more than a 2m * 1m * 1m horizontal cupboard is a combination of government restrictions and psychological factors which are arguably waning. It's really medical care that's the huge elephant in the room IMO. That's the big problem, and the one I haven't yet seen too many projects try to tackle. I have a feeling it'll come in due time, but it'll take more advanced innovations like chemprinting and nanotechnology to get there.