I own both an RV and a camping trailer that we tow. The RV is for smaller trips and the trailer is for our 3 month trips. We always have bought used after our first brand new one. Was told they trade in good and that is not exactly the truth. We have always been very happy with our trailers. Look for one that your vehicle can tow, you want more power than less. Go on Craigslist and look them over: front kitchens, rear kitchens, middle kitchens. Get as much storage as you can, you will use it. Before you buy,make sure everything works great, no matter what!
I love traveling in my own bed with linens that are clean and I know are clean. Buy a Federal Pass for $25 and camp in Corp of Engineers Parks for $10 or state parks. I have camped in 49 states now and consider myself lucky.