Looking for TT to fit our needs. Newb.

Towing, especially with an older SUV is not always all about weights. Frontal area of that big box will create a huge sail behing that SUV slowing you down terribly. First thing you really need to do is load family and all your traveling stuff into it, fill the fuel tank and drive across a set of scales. Then look on the drivers door post for FAWR,RAWR, and GVWR numbers. Stsrt doing the math. You will real quickly discover your available payload is much less than you might think. Remember approx 12% of a loaded trailers weight is added to your scaled ready to travel weight.
I really think that that after is said and done your best choice will be a tent trailer, not a full sized travel trailer.