Is this the trailer you are interested in:
https://www.rvtrader.com/listing/201...BDS-5008344530
Looks like it ticks a lot of your boxes. I am not sure about the length and weight but a 3/4 ton should have no difficulty dragging the thing around. We have owned quite a few trailers and I have no negative issues with a bumper pull. Main advantage is you can stand up in the bathroom. I think the ideal length for a bumper pull for us would be in the just over 30' length but we don't have a kiddo. I like the ability to shut doors on the bedroom as I am an early riser and the missus not so much. I also know if I was camping with a kid and the kiddo was sleeping on a couch, that would limit early rising and coffee drinking unless you remember to drug the youngster before they hit the sack.
I like to sit across from the TV when on the couch but that spinner TV could be a good solution. My wife really would like to have a bigger bathroom but loves our rear kitchen with a ton of counter space and big pantry. All in all, that bunk house you have your eye on looks like a good choice. There WILL be things that bug you but that is always the case so you compromise on little features to get most of the biggies! Good luck.