And that’s sufficient for roughly 100 unoptimized DC grade H200s.

Not efficient, and it doesn’t have to be, because the cooling system has 0 opex cost. And capex clearly can be made to wor

OK, so you've got a football-sized solar and radiator array to support 100 H200s.

Why are we not building it on land again in some abandoned mall's parking lot?

Because it’s allegedly more expensive