They may be out of your price range, but Lance makes a real nice TT that is well built and lightweight - the only thing you might not like is they are not all that long - however they have one with a rear chairs, U dinette in the slide and a front bed - all is about 28' overall length. I am not sure how well they will hold up in the long term, but I know that Lance Campers are the top of the line and well built.
Most units designed for camping do lack sufficient wardrobe space for extended traveling. I really liked the amount of storage we had in our older Arctic Fox 22H - but when looking for it's replacement we discovered that in order to get enough storage for extended trips - 1+ months at a time we needed to expand into the 31' rig we just bought. Actually when looking a floorplans and photos I thought that a smaller unit would work - we started looking at both ORV and Arctic Fox/Nash units that were considered to be the next level above what we had in the 22H none of them felt like they would be livable for more than a week or two - the DW stumbled across the Timber Ridge 25RDS and the rest is history. However I am glad I also have a new diesel truck to pull it - I don't think a 1/2T would be able.
I think you really need to assess your needs and wants and either get a trailer that will match your truck - but might not be the ideal one for long term living or look at a new truck and trailer suited to your needs.
2017 Chevy 2500HD LTZ DuraMax Diesel Silver Ice Metallic
2017 Outdoors RV Timber Ridge 25RDS Mountain Series 4X Off Road Suspension Pkg