That's a cool idea. All they did was take as standard toterhome and build the rack over the gooseneck area. I'm assuming they already had the truck, or else it would be a whole lot easier and cheaper just to pull a 4 place trailer with a standard (non toter) RV or TC.
And blizz has a point, that thing ain't goin' nowhere when it gets off of nice dry pavement, most of the weight is on the front axle, and no heavy trailer to put some weight on the drive tires. Cool though.