Alan and I live in our 32 Travel trailer while we are out chasing storms and working on hail damaged vehicles. We started out with a 27 ft bumper pull, travel trailer without slides. It was cheap and lightweight, but boy it got really small, really quick. With his stuff and my stuff, we got closterphobic! And we found out that we basicly had a weekend summer camper, which means it was not insulated very well. Cold nights, we'd freeze! When we upgraded to our 32ft, we made sure it was a 4 seasons, and an aluminum frame construction. It is heavier due to the slides and fiberglass sides, but the camper is much nicer. Its a "get what you pay for" with campers, and I dont know if I would buy used if you are looking at a travel trailer, because the interest rates are way lower for new ones, than used. Ours was around $30k new, & the payments are around $280 which we split. I think insurance is $150 a year. Make sure you get a Tow Bar / sway control for it and if you happen to get a camper low to the ground, you MUST weld some caster wheels on the rear because you will drag it.
hope this helps!
Jason