I would suggest you fold most of your clothes...t-shirts, shorts, sweat pants, jeans etc. They can go in drawers, or you can put shelves in one of your closets and put the folded clothes on the shelves. You can get those square cloth storage bins for sox, underwear etc if you don't have enough drawer space. You don't need full length wardrobe for anything but long coats and dresses which you undoubtedly won't need when fulltiming. You can store those rarely worn items under your bed.
It's not ideal, but it's cheaper than buying a new RV.
We plan on spending the majority of the time in locales where it's warm enough to wear shorts/capris and short sleeve shirts.