Thank you for the quick responses and good information. It sounds like you confirmed what I already suspected; the payload capacity is too low for a 5'er.
We put a deposit on the trailer but haven't signed any papers so I don't think there will be an issue getting out of the "deal" (since they essentially are lying about capabilities anyway).
One more question though...Is the payload issue something that can be addressed with air bags in the truck?
Thanks again guys, I really appreciate it.