Perhaps I'm misunderstanding, or approaching this wrong as someone who doesn't tend to have bad reactions to altitude if I am careful with it. But doesn't this kind of defeat the purpose? Won't your acclimation take a lot longer (or never happen fully?) if you're spending most of your time at sea-level pressure? I imagine these folks would be very comfortable in their houses, but the sudden increase back to 10k feet of pressure whenever they left home would leave them out of breath and susceptible to acute mountain sickness even weeks after they arrived in Colorado. Unless I am misunderstanding how acclimation works, this seems like refusing to rip off the Band-Aid.
There's also the other rich-person-pressure trend of sleeping in hypobaric chambers to simulate altitude and promote red blood cell and lung growth. Seems like probably at least one of these practices is wrong!