If your current trailer is 16 years old, that puts its construction pre-2008 great recession. It's at that point, IMO, that build quality in RV's took the first big hit. Then more recently it seems to have declined further, based on anecdotal evidence at least. You could spend $63k on a new unit, then additional money to personalize it, and end up with a nightmare of dubious construction issues, leaks, and who knows what else. If it were me, with the seasonal situation you laid out, I'd stick with what I know, which considering how it seems to have held up was built fairly well.