Wow. That is one impressive display!
Instead of a lot of compressors, have you looked at a rotary screw compressor? It is much quieter. It can run non-stop. It will give you a LOT of air. I suggest you go to a propane company and ask them if you can buy a 500 gallon tank that is out of service. It will not work for propane, but it WILL hold a lot of reserve air. You could keep that one tank filled, and branch off as needed.