measure the length with a tape measure and then pull it over some CAT scales for the weight. More accurate than a brochure anyway. :)
It's a basic trailer, steel chassis, wood frame and aluminum siding. Appliances are all pretty much the same, not much to be learned from a manual, I'd say. Replace the stuff that no longer works, upgrade the converter/charger to a nice 3 stage unit, and go camp!
oh, and re-caulk all the seams, especially on the roof. Looks like a bit of an issue on that rear lower corner, with the siding pulling away. Check all the corners and make sure it's sealed up.