I don't see how one storey on wheels is going to solve anything. The main cost is the land, a decent mobile home will not cost much less than a house of the sam

I don't see how one storey on wheels is going to solve anything. The main cost is the land, a decent mobile home will not cost much less than a house of the same size. Once everybody are going to roam around in their mobile house the cost of parking land and infrastructure will be exactly the same but with added strain on the roads and cost of fuel to move those houses around. Not to mention the psychological cost of being a nomad with no roots and no community, especially with children. In addition not every country has so many empty spaces like the US, in many countries even a single storey home is something only rich people can afford and most people live in apartment buildings, like in NY city. Why not just build high buildings with various sizes of apartments, not too many limiting zoning laws and good public transportation like they do in Tokyo for example? This is already a proven way to solve those issues.