During the weekend of Oct 22-23 and oct 29-30 up to two kids are free with an adult as long as they are in costume (the kids lol)

anyways my brother in law and his girlfriend offered to pay for the adults if we all went one of those weekends (a token of appreciation for helping them out) plus it's around my daughters b-day and he knows I really dont have the money to throw a party...

So I am trying to find some ways to lower the addmission costs as there will be four adults going.....

Thank in advance!