I assume that you have found a way to use your twin hulls to launch a kite.
I can only add to my previous post to have you look at what has been accomplished by previous Masters of the Game.
Peter Lynn was the dude that started the Kite buggy revolution by using small power kites on fat wheeled trikes. (ie: You don't need a monster to get you moving). Those same kites are also used for ski kiting.
If you look closely at what Mr Lynn accomplished was to use the Laws of Physics to get that job done. His Kite Cat needs refinement before it's accepted by the masses as a Sunday afternoon fun device, imho.
It seems in line with what Hobie has done in the same degree with their Cats and Sailyaks by using simple sailing principles for their entry level boats.
Winches are a pain in the butt to operate. However winches with pressure sensors on large kite powered vessels are also available in this age thus allowing a computer console to run the entire boat on Autopilot.
Trust me, it won't be long in this century before large freighters are run on this method as the precious fuel that they store will only be used for docking purposes.
Your links were fun to watch but seemed over complicated for doing a simple recreational job for something that was invented thousands of years ago in China:
Using the wind trapped into a bag to move you.