Mike, there is nothing quite like the activity of going out on a piece of sand hill property with a topo in hand, and begin the process. I have done this a couple of times. The 800 acres I was interested in south of North Platte is actually less severe than most of what I saw in and around SHGC. It actually seems to be able to yield more routing possibilities because you don't have such high sand ridges and such deep troughs that you find up in the real sand hills. Yet, when you begin to study the topo for days on the table, then go out for more days walking and charting out the actual on the ground, walking and looking, you can see the multitude of possibilities, which must then be sifted down into a logical routing rather than a collection of holes.
In a several thousand acre property like SHGC that DY owned or had control over it, I think it is hard to find between 250 and 300 contiguous acres in a patch among the vast sea where everything comes together in a routing with the best green and LZ sites.
In a way, it seems easier to have a flat piece of land, figure out how you want to drain it directionally and so forth, figure out where you want to dig ponds to most effieciently move dirt to features by shaping along the route, and just jam the routing together at your convienience than find one great route winding though natural features.