This is my "Expedition"-setup with big wheels, about 55cm diameter.
Some Kite-buggys for soft sand are alike.
Sail/ Kite should be with some grunt to keep going on less than ideal courses, uphill etc. Topspeed is surely limmited by driving-ground.
And perhaps sit upright for better overview...
(The place where for cruising the dunes behind the horizon

....at least on this photo)
Joe