Durability.

I am looking at upgrading from a popup to a travel trailer. I went on the trailmanor site and this seems to be the answer. Here in Newfoundland, Canada, we have roads that are like your byroads. Our roads are a bit rough compared to your great HWYs in the states, due to our very cold winters, etc. My question is, how durable are these trailers when towed for long periods of time (like years) on rough roads? Would I be able to tow one with my Grand Caravan 3.3Liter and would I need a towing package and/or better suspension, etc? Any info would be GREATLY appreciated!!!! Thanks. By the way my name was supposed to be Curious in Gander and I had registered before I realized it was spelt wrong. How do you correct that?