[pjeide]

Put the apartment buildings above ground, and RV parks underground with fresh air pumped in and fiber-optic lighting carrying natural light down from the surface. Have elevators going from below ground, and from the apartments, to ground-level retail complexes and terrestrial activities.

Then have underground hyperloop tunnels to connect the RV parks, so that you can go to sleep in your home and move it from city to city, and pop up above ground to enjoy local tourism.