The best place to find info on, and used, TrailManor units is the
Owners' forum.
I have had two, and loved them. Since the business has been sold, the biggest concern about getting the torsion bars is now moot. They are not hard to work on, if you need to.
Any good product will cost more than lesser-quality competitors. TrailManors are not more expensive when compared to comparable quality and functionality. I hear many people complain about how bad their less-expensive trailers turned out to be.
I love how the TrailManors tow, as you don't get buffeted by wind, and my fuel economy was much better than when towing a regular trailer. The main reason I got rid of my TM was that the wife wanted a walk-around bed. I used the TM for pheasant-hunting weekends with buddies, and also weekend and week-long trips with the wife. We all thoroughly enjoyed the TM.
If you are serious about a collapsible hard-sided trailer, I would suggest finding a few TrailManors to look at. On the Forum, there is a listing of For-Sale units near the bottom of the page. There are some very good used units available, in various parts of the country. I believe TrailManors weigh less than Hi-Lo units, and they expand to longer living space.
Good luck!