Tom --
Seems to me that, using Mr. Macdonald's basic idea for a practice course (three contiguous greens with three tees apiece ... I think; a Short, an Eden, a Redan?), you could build quite a facility on 10 acres.
You could have three sets of three contiguous greens, with three different tee boxes for each set of greens. Voila! A 27-hole facility! 3 short, medium, and long par-3s; 3 short, medium and long par-4s; 3 short, medium, and long par-5s! (Let the Green Committee figure out where to put holes 28-36 -- and screw up 1 through 27 in the process.)