The per diem rate for Oshkosh is $77 for lodging, $46 for meals x 78 controllers x 6 days is @ $58000. Even if the controllers went first class you could not get to $500,000. As far as over time how much could that be with the airport closed at night and during the air shows.

no way the EAA should pay, but if they do they should ask for an itemizes bill.