You guys were talking about big cites, we could try the MN state fair grounds. It's pretty much right in the twin cites. It looks like form the price sheet if we get the second or third floor in the 4-H building it would cost $525 a day plus and $525 for parking and about $250 for labor.
Price sheet here http://www.mnstatefair.org/pdf/16_Event_Rate_Sheet.pdf