I have done a moonwalk. They are great! The cost should be no more then $110 for about the whole day.
(mine was from 11A to 11P) Call and check around for prices – they vary from about $75 to $200. Also make sure the price includes drop off, set-up & pickup. That is the best way to go.
Set-up isn’t that hard, it is tearing it down & bringing it back. Oh – also we had a table set up where the kids could do Yu-Gi-Oh tournaments between jumping. That was it other then the cake & presents.
The kids really enjoyed the tournaments – plus it gave them some down-time.