just wanted to say that you've already made some rash decisions that haven't worked out and it sounds like you're following the same track.
since you have a limited tow vehicle, you really have to take your time and be patient and not be drawn into quick decisions.
if you had a more capable TV, you could pick whatever you like.
the TB's I-6 engine is the limiting factor. a 6 cylinder engine can only tow so much.
using the fantasy "dry" weight is #1 newbie mistake. no trailer actually weighs that on the dealer's lot. you have to add 400-600lbs. to that for options and battery.
my Roo 23SS weighed over 400lbs. more the the "dry" weight on the lot.
so, this 26BH will weigh at least 4650lbs. before you add the battery, propane and cargo.
no matter how you look at it, you'll be at or over the towing limits of your TB.
don't believe the advertisements about minivans and small SUVs towing full-height trailers. in perfect flat, no-wind conditions, yes they can. but that's not real world conditions, such as mountains and high winds.