Welcome to the forums.
1. A 3/4 ton burb size vehicle or a 3/4 or a one ton size passenger van with your crowd.
2 .You'll have to look at each floorplan and decide which is the best for your needs/wants.
3. TTs to stay away from ? Brands....Thats just a personnel choice as their aren't any brands that someone doesn't like.
4. With your family the 2 bath rooms may make sense.
5. Are those weights you listed a mfg dry weight or the trailers gvwr. If their a dry weight add approx another 1200-1400 lbs for loading. Good luch ...you got lots of looking and decisions to make.