How much electricity will it take to air condition 8,267,200,000 cubic feet?
I’d be surprised if they’re not planning to use heat pumps and underground heat-exchange grids. Some neighbors (a couple miles from here, out in The Boonies) has had that since they built their home, heating and cooling, and they get just the one bill. :^) Even in Michigan, its temperature-stable starting about eight foot down.
OTOH, the floor and window treatments are gonna make someone pretty rich...
It’s gonna be a bitch to dust.