Have you looked into church community/family centers that you can rent out? My husband and I are Clowns and we've done quite a few birthday parties where the family has rented a community/family center. There's usually a good amount of room (even for a bounce house and us) and a kitchen/bathroom. You would provide the food/beverages and entertainment yourself. I don't believe that they are too expensive.
If you do need any entertainment for your party, please take a look at our website at www.freewebs.com/bubblesandwowza. You provide magic shows, face painting, balloon art, glitter tattoos and even cakes.
Hope you have a great party.
K. Schmidt
Bubbles the Clown
###-###-####