Really ? Is a yugo a racecar?
It's a car, and you can race it.
The Harbor freight trailer is a trailer and you can pull it, but would you want to pull it with a sport touring bike? I could see pulling it with a trike, or a Harley, but I believe it would take away from why I ride a sport touring bike, which is to enjoy the curves.
I'm not saying you shouldn't buy the HF trailer, I'm just saying don't let that trailer determine whether pulling a trailer is for you or not. That trailer is the Yugo of trailers, while the Bushtec trailer is the Porsche of trailers and the UniGo is the sport bike of trailers.