MY advice to you: Although NuWa and Hitchhiker have a very good reputation, you are not prepared to buy a RV to live in fulltime. Apparently you have never owned one before and there are plenty of little nuances with any RV so that the learning curve can be big for someone never RV'ed before. Buying something in a day, taking it a thousand miles from home and then trying to live in it fulltime is too much too soon.
Also, that trailer has a hitch weight of about 3,000 lbs. and a gross weight approaching 17,000 lbs. + packed with your stuff. Is your truck REALLY capable of that?