Well, the planning restrictions don't just come from nowhere. People pay for them (with their lobbying time, lost rent and so on) because they want them. There's a market for "no poors in the neighborhood", an unpleasant market, but a market nonetheless.
Add to that the fact that there's plenty of cheap housing in places with no jobs. So, what should we do? Should we fight against the "no poors in the neighborhood" market in rich cities? Or should we make more jobs appear in other cheaper places instead? I don't know the answer, to be honest.
Pay UBI only at the level needed to live in the place with no jobs and cheap housing.
> There's a market for "no poors in the neighborhood", an unpleasant market, but a market nonetheless.
I place freedom as a higher value than the market. Thus while I recognize that market exists, I don't allow anyone to serve it. Your ability to keep poor people away ends at your property line. They can walk on the sidewalks in front of your house because roads (a sidewalk is just another road) are not your property. They can live in a shack because that isn't your property and so you can't control what they do on it.
Freedom isn't absolute. They are not allowed to release poison into the air just because of freedom (unless they can keep that entirely to their property - which ends not far above their buildings since airplanes get their own roads above their house)
segregating poor people into their own area is a sure way to make them stay poor. i believe there is evidence that the best way to help people out of poverty is to let them live in mixed areas where they have a chance to associate with people who are better off than them. i believe the primary reason is that even if you work hard to improve your life, as long as everyone around you remains poor then you are limited or are self limiting in how much you can actually achieve.