Would you be ok if instead of 97% of earth being empty 94% is empty and your rent is cut in half? Another plus point of the future: An electric autonomous bus is at your disposal every 5 minutes, bringing you to whatever nice lonely place you wish.
Costs of buses are mostly the driver. Which will go away. The rest is mostly building and maintaining them. Which will be done by robots. The rest is energy. The sun sends more energy to earth in an hour than humans use in a year.
And use of solar energy is absolutely unrelated to doubling the living areal. That can, and should, be done anyway.
Which of the few remaining wild creatures will be displaced?
https://www.worldwildlife.org/press-releases/catastrophic-73...