Can you buy an empty travel trailer?

Not that I've seen. I did a complete gut and rebuild. The demolition part of the project probably involved a day or so of labor. Depending on how you wish to outfit the mechanicals, buying a working trailer and saving the appliances and plumbing fittings would save a good bit of money over buying new. I only saved the bathroom sink and countertop, the shower stall, and the toilet. The restoration thread is in my signature line.

Here is a guy that knows a few things about building a travel trailer:Adirondack Airstream