Also, If I had about 10 func_rotating entities by eachother about 100 units away from eachother, would I see performance problems?Depends what system / connection you have, I would say dont do it, try to keep the lag down to a minimum.
The red lights are good, but they are too bright. Lower the brightness to about 75 - 100 and it would look much better, probably 75 I would say.
If you want moving parts for the generators try to keep it down to a minimum. Perhaps one generator with an exposed inside and 1 fan would be good (would be funny if somone walked into it aswell trying to hide.) otherwise I would say having 10 moving parts in a row is a bad idea, generators of such magnitude dont have exposed moving parts and it would be easy to sabotage them.
A teslacoil type area would be cool, not somwhere the players can accidently walk into and get killed by it (like suspended above a room or behind a protective glass screen or somthing).
This map is looking great, make sure you ask me to help when you do the play testing