Here is what Ran says about Sand Hills in his profile of the course:
"During 1993, most of the work was concentrated on the irrigation system, which comprises about 85% of the total golf course construction cost. Fairways, greens and tees were developed in 1994, using the following procedure: 1) mowing existing vegetation to ground level; 2) tilling all areas to a depth of 6′; 3) doing some minor finish grading on the greens – rough grading expense was less than $7,000 – primarily with a small power rake; and, 4) applying seed fertilizer and water.
"The Lodging Information booklet points out that because of the excellent sand particles, the cost per Sand Hills green was $300 as neither drain tile/gravel under the greens nor special greens mix were required. Put in perspective, the average cost of a USGA specification green is approximately $40,000.
"When the course opened in June, 1995, the most natural course built in the United States since World War I had opened."