That's not the answer to the homelessness. There's plenty of housing everywhere just sitting by to drive speculation. Building ghettos/camps is just for giving rich people good conscience that they don't have to see homeless people when they go out on the street.
Not in the US. Occasionally, some effort to make a homeless camp livable is talked about but the powers-that-be still act to do the opposite, first the make homeless camp a hellhole and then kick everyone out to re-appear elsewhere.
Isn't a livable homeless camp a shanty town? Is that really something to aim for as the long term solution? Personally, I like the freedom it gives residents but it also gives them health and safety problems and people are generally awful at protecting themselves from that.