You need to find out what the max weight your TV can handle. That would give you an idea of the max weight of the HHT. But, make sure to give yourself some room for safety. Take into account weight of all the gear, supplies you are carrying, etc., etc.
The type of WD hitch and TV also play into what you can tow. My first TT (24')weighed only 5,000 pounds, my TV was a Jeep Grand Cherokee (V8) that could tow up to 10,000 pounds. But, I had a bottom end WD hitch and sway bar setup and it was a bad case of the tail wagging the dog.
There are so many brands available now days it is hard to recommend what is good or bad. My first TT was an Ameri-Lite, cheap, entry level, but one of the best RV's I have had owned. Also owned a Jayco, suppose to be better quality, but had more problems with that than my Ameri-Lite. Just find one that best suits your needs and go for it. If buying used, get it thoroughly inspected, especially for water leaks.
Ken Smith
2017 Dodge Ram 2500 Big horn 4x4 6.7 CTD
2020 Grand Design Reflection 287RLTS