I am having my wedding in my backyard, the one problem I am unable to figure out is this; I have a built in underground trampoline. It is about 15 feet in diameter. I have thought about trying to take down the trampoline and cover the hole to make a dance floor, but don't think it would hold the weight of people without some kind of support in the middle. Also, I am working on kind of a tight budget so I can not afford any type of plexiglass. Any suggestions of what to do with it would be greatly appreciated! Thank you ALL!