I would buy used. One method of seeing how a unit holds up over time is to look at a lot of used rigs. Some were taken care of , and some were abused. Ours was 4 years old when we bought it and it looked brand new. So, for us, we purchased a rig that we felt would hold up, and it has. It is now 13 years old and we are in no hurry to trade it in.
BTW, many folks think an RV should be built with the same quality as a stick-built, but they are not intended for the same purpose. They are meant to be used part time, not full time, IMHO.
