lmao this feels like a setup by pointing out how these could be habitable, but I'll spoiler the pragmatic, most likely based on timing, but not best-for-community use-case because it's not in the spirit of your question.
spoiler
Dataetention Centers
Large concrete buildings with no visibility in or out, a short drive for ICE from anywhere. Plenty of space for the immigrants, dissidents, and other undesirables. And since The Government didn't have to build them* and can buy or lease them cheap when AI bursts, this will be a beautiful deal for the Taxpayers, maybe the most beautiful and artistic deal of all time.
*not counting the subsidies, tax breaks, and bailouts
Sorry. I hope I'm wrong.