I WOULD GO WITH FIBERGLASS, whatever is lighter will be easier to tow.
My father, to make extra cash, buys repo units and fixes them up and resales them. I think he has done about five or six. He has a 2004 right now that he got from a bank at a pretty good deal because the water pump was burned out and the generator would not start. The generator only needed the battery cable tightened and the pump was simple to change. This one even had the hoses for hookingup. All the others didnt and most were missing the tv,vcr,mirowave and things like that. One was missing the bed, I can see someonekeeping the tv/vcr but the bed, I wonder if its the owner or the repo guy that takes some of the stuff. The least profit, not counting labor, he has made is 1000.00 and on one he made 7000.00.