Have to agree with Allworth. Your second choice is 35 feet long, has a GVWR of 8300 - close to the fictional Tow capacity number. Tongue weight is usually calculated at 12 - 15 percent - not 11. And that is still a calculation - not actual. If you can't use the gross weights in calculations which are at most good guesstimates, then you are pushing your luck. And of course you stated exactly what most in this situation say - "we will only load it to half it's GVWR". Are you going to weigh stuff as you put it in? If your calculations can't come in generously below the TV capacities using the gross numbers, then your sticking your head in the sand.
I'm assuming your TV has the tow package. Did you check what the receiver limit is? It does have a receiver vs a bumper mounted ball - right? Are your tires passenger rated - for a good ride? You need better than P rated tires. Looking this TV up, I see standard equipment are P265/70SR18. what is the load range on those? - you have a vehicle built with the purpose of transporting lots of people in luxury. That's what is making your payload so low - all that stuff. Do you realize how much all those options weigh?
And as far as the least you can do - since you are calculating with fictional numbers, is to load it up for camping and take it to a
CAT scale to get it weighed. THEN, you will know what it's payload is.
Your
second choice has two big slides and is within only a few hundred pounds of your "tow capacity".
Here is an
older discussion regarding your TV.
Of course all this is only my opinion - I would look for something smaller in the 5 to 6K gross weight range. If you really want to be responsible - get the TV weighed and then go looking for a suitable TT.
Good luck - do what ever you feel is right for you.
