zeni7, I am trying to fulfill your wish even if I am not part of the rich celebrities, or billionaire club.
I am slowly filling up half a small room I have in my basement with PC's devoted to WCG. I mean small about 6 m2 of which 3 m2 are accessible to me. The rest is for moving around and other stuff for the family. At the moment I have 5 CPu's in there. Others will follow in te future.
Some of you may ask what about the heat and ventilation as the machines run non stop 24/24 7/7. Excellent question. We are in winter and outside at the moment the air is at -5 Celsius or 23 Fahrenheit. Just opening a little a small window I have in there I get the best airconditioning in the world with 0 carbon emission.
In summer time I may have some problems though. Not tested yet.
The other trouble I had only one power plug in this small room and the available power was on the house grid were many other things are also connected. Result the fuse blew up and all lights and whatever else went out in the complete basement of my house. Had some negative reactions of my wife. Now I had the electrician install a new direct line with 6kW power available and a separate fuse. Should hold for some time. But in the end I may have to add some forced ventilation or cooling, we'll see.