The stacked mobile homes
Seriously, how stupid is that? AND impractical!
I suppose they were trying to say that in the future, there are tons and tons of mobile homes but not enough space for them, so they decided to (somehow) stack them on top of each other. Not only is that unsafe, but how exactly do you lift up a thin shell structure like that and not crush it?
Put it this way: Why not just move to the existing cities? Or build new apartment buildings? Is the distribution of wealth really that uneven in the future?