Oh, that's probably way low actually.
Figure your average out of town guest here, and let's say 1,000 people travel into Brookfield for the show, and they're sharing hotel costs. Not an absurd number of people either. Figure 500-600 in the Sheraton, and we all know how fast that sells out, so people are definitely elsewhere.
Per Person
Hotel $200
Food $100
Tickets $60
Gas $15
You'rs already at $375,000 if they're super cheap and don't spend a dime anywhere else in town on anything. If they each spend on average $100 on 'stuff', you've just about hit the half million mark already.