Trailers are pretty simple, mostly components put together in a wooden frame package in various shapes and sizes. The components are nearly never manufactured by the RV manufacturer.
Other than warranty issues, there really should be no major worries when buying where the price is right, most often there is a dealer in your general area who will work on your trailer, remember, just because they did not sell the unit, they are usually more than willing to accept a warranty check from the manufacturer.
If you have any handyman skills, most items can be fixed at home with less hassel than dealing with a dealer, obviously, mechanical issues involving the components may take more expertise than the handyman skill level.
Good luck with your new trailer and don't sweat the small things.