Amusingly yes, this is probably the best bet. The temperature and atmosphere around 34-35 miles from the surface are comparable to Earth. And you get comparable

Amusingly yes, this is probably the best bet. The temperature and atmosphere around 34-35 miles from the surface are comparable to Earth. And you get comparable gravity and radiation shielding as a bonus. Good luck storing water and other supplies though. I foresee water piracy in the floating cities.