there is really no such thing as a "well built" travel trailer...they are all built like crap. Once they get ripped open, it's just a sh*t show to repair. they are built from the inside-out, and so to get at inner structure the thing has to be basically dismantled. There is SO much potential hidden damage, and additional repairing that might be needed, that we appraisers/adjusters would write a "visual damage only" initial appraisal, then figure in our heads that the actual final repair bill will be at LEAST double that number. Hence why we would total most of them. Figure on average 25-35% salvage value, so it's that number, plus expected repair cost= Total Loss.