I will second the Arctic Fox comment. I do not have one buy by cousin does and it is a very well built trailer and as solid as I have seen. It also is heavy which is probably why it feels that way. With your TV this won't be an issue.
"Boondocking" means a lot of things to a lot of different people. If you are going to be living in it for 8 months at a time I would say get a big one, the bigger the better actually. If you plan to park in a place where you don't have hookups then I wouldn't get all worked up about clearance. My cousin's Arctic Fox has a lot of clearance, more than I like actually as I think there are 3 or 4 steps to get into the cabin.
If you are going to drag this up mountain logging roads and out through the trees then clearance will be a big issue. I would never buy a trailer and then flip the axles unless that was all I could afford.
Northwoods Manufacturing make a number of trailers that have cold weather advantages. Look for thermal windows and a covered insulated belly pan and ducted air. My cousin's Arctic Fox has a great AC system that keeps it cool and is very quiet.