Welcome Paige. I have no advice or experience on fifth-wheel trailers.
The only advice I can offer is the same as others: get ready to pounce when you find something that fits. Fortune favors the bold.
When I bought my Scamp
13 the paperwork took longer than the deciding. Having said that, water damage, especially in floors, seems to be the worst thing to discover, so be sure to try discovering any before buying.