That appears to be along the same lines of a UniGo trailer and would no doubt require a special hitch set up I'm guessing. Maybe a little to low profile for my tastes..... I would have to have a flag or two flying off the ass of that so no one ran over it.
The low profile will help keep sway to a minimum. With a Uni-Go you have to be careful of how you load it. Make sure to keep heavy items LOW to reduce sway. If loaded correctly, I can run 95+ without sway... but load it top heavy and it starts to wiggle at about 65.
The idea of a flag off the ass-end WOULD be a good idea though... definitely want to keep people in large trucks from driving over the back of it.