I agree that’s probably a 17 or 18’ TT and the weight sounds like it’s in the ballpark. I have a 1989 16” TT that has a GVW of 3000#. But I don’t think I’d be happy pulling it with a Ranger, I’d be more inclined to think PU with that TV. Or a teardrop or lighter TT. Weight is a factor, especially if you’re climbing hills, but wind resistance of a higher TT is a biggie and your gas mileage will not be very good in any case.
You’d likely do better in that respect with a bigger TV because the engine wouldn’t work so hard. I pull mine with an F150 5.4 and it gets the same mileage towing as it does solo town driving.