Just bumping this thread...as it seems to have been bumped more than a few times over the years.
FWIW, Harbor Freight has their little folding trailer on sale for $299 right now.
http://www.harborfreight.com/automo...tility-trailer-with-12-inch-wheels-90154.html
I'm looking really, really closely at them, especially when I see how easy it looks to make a whizbang tandem trailer out of them. One that folds up and still stows away easily after the fact.
I'm going to call tomorrow and ask how long they're on sale for. Even at $300 USD we're only talking $420 CDN, 13% at the border if you're not staying long enough to take it as your allowance, in the end still under $500.
The only issue I see with this trailer is that your outside anchor points are close to the bike. I'd want them to be as wide as the fender for stability. Not a big issue with a small bike or dirt bike. Unless you use a pitbull TRS which then the channels are in the way.