The type of venues I would have access to would include a community theater's black box space (150ish x 100 feet). A theater that seats 2500. An amphitheater that seats 40,000 however, the amp would be a LONG shot...
I know for sure the last two places have at least 400amp three phase services. However, the amp would be outside 30,000 seats are covered
(but it has 800amps). Last place I could think of is my place of work... again we have three phase available... all the feeder, lights and sound equipment we could ever dream of... its just that would be hard to work out too... cant drink there or smoke indoors... idk, this is all stuff we can talk about when we get closer... the other thing is that with the use of the theater I mentioned... we might need to be there during the week, since it is a VERY active theater.