Newbie Seeking Some Information

I would take a close look at the Venture travel trailer models in the length you are wanting. They have a lot of good features including a large shower in the rear bath and the use of the murphy bed up front which gives you the advantage of a full bed and the sofa at the front of the trailer. They also have a continuous one piece roof that runs from the bottom front to the bottom rear of the trailer. It should be less prone to leaking at the seams than normal TT roofs.
If I were in the market for a small TT, they would definitely be on my short list.
I also agree on the recommendation to use a WD hitch.
Barney