I could write for many pages about what you will need to start a simulation center...We just did:)
I was reading the answer someone gave on the gases. We had O2 and Medical Air installed, like you would find in the hospital. Just plug into the wall and its ready. Although I do not know how much was paid for this system, it was expensive but it is going to eliminate the sound of the compressors running. If you are running more then one scenario in a room (two beds occupied) then the sound gets to be too much.
It's definitely worth spending the money for this system. This does answer the question about the future....this kind of thing IS the future.....