[The Nothing]

I'd have to give that a little bit of thought, but the right Yakima Q-towers at the front, with a hi-rise kit would take care of your front point, similar to what i did. Then, at the back you'd need a Class II hidden hitch (removable receiver ideally) from which you can run a T-tower to make up the rest of the height to take the kayak off the canvas... something like this