Cheap trailers are great, however they usually contain rotted wood flooring and ceiling. So whenever you buy a trailer, I strongly suggest reinforcing the flooring, and patch up the top or cover it with a tarp or something. If you are using multiple trailers for your haunt, it's more convenient for the customer if you put them all together and connected. Going up and down is not worth it unless there are some insane scares...but I know you'll do fine Pete! I hope the interactive part of your haunt is still alive!