The problem is zoning and regulation and animal agriculture, imho. Hear me out. Just 1% of habitable land is urban and built-up land (1.5 mil km2). Buy a land

The problem is zoning and regulation and animal agriculture, imho. Hear me out. Just 1% of habitable land is urban and built-up land (1.5 mil km2). Buy a land (native Americans didn't believe that anyone can own the land, that land belongs to everybody - maybe there was something true about that) and try to build a house on it. So many regulations - where you can build, what you can build, how it would look, what materials are acceptable, etc. Try to build a house from hempcrete, for example. A material used for several thousand years in Europe, but now it's much harder to build and to certify such house (due to regulations and approval processes), that everybody builds with bricks and wraps their house in mountains of polystyrene instead. That doesn't make sense .. you have to build a house from a material with abysmal insulation properties, and then wrap it in several layers (10 maybe) of additional materials just to have a working shell. Then stuff it with plastic stuff inside - that for example lowered time the buildings are fire resistant from 15 minutes to mere 2-3 minutes now (IIRC). Or try to build something with earth pressed blocks. Also pretty common historical method from the area where I'm from, very comfortable living, breathable, low-cost, ecologic. That's something almost never used now, although it has a lot of pluses compared to the "modern" ways of building. Try to purchase a land and build a block of flats on it. No, the building office will say, no such houses in the area, just single family homes here, single floor, minimum land 800m2. No way to build small flats or houses with those minimum area requirements. We don't have enough place to build new homes, you say? We use just 1% of all habitable land for buildings and stuff. What about those 37 mil. km2 we use for "livestock" [0]? I for one can't wait for the times when the majority will switch to plant based diets. This is just one of the many things that would solve ... [0] https://ourworldindata.org/land-use https://ourworldindata.org/land-use