Awesome looking sail too.

Great looking set up!

I have seen a yacht built around a kayak. Was really slick looking. With the addition of a spray skirt, it would cut out
all the turbulence associated with the cockpit and the "boat tail" would do a pretty good job of reassembling the flow at the rear. With a long enough yak the front wheel could be enclosed and the rear axles covered with airfoil shaped fairings like used on
ultralights. Properly built(with difficulity Im sure) it would have a full under pan also, Would definitely require a purpose built frame though.

Good luck on your run!