I am thinking 1040 acres (4.2 sq km), ocean front would be nice, laser levelled then covered with hot mix bitumen. At appropriate positions the hot mix is punctured by galvanised or stainless pieces of tube for the placement of turn markers to allow for a variety of courses to suit varying wind directions.
A couple of hundred acres could be cracker dust for the skid freaks.
One boundary of the property would front a major tourist thoroughfare and an adjacent boundary to that one would front the beach access road. On one of those boundaries would be located the car park, licenced club house and bistro, shaded pit area, fully equipped workshop with lathe, drill press, welders etc and of course the Hire and Tyre Shop.
The property would be owned by a body corporate whose membership would consist of millionaires whose main interest is in having tax writeoffs.
The body corporate would of course grant me exclusive and unaccountable management and marketing rights to the whole complex.
I think it would be a perfect course, so the only question is location. There is a bit of waste land between Bangalee and Rydges Capricorn Resort near Yeppoon that would fit the bill.

