The only thing close to the "Himalayas" that I 've seen attempted in the U.S. is the wild putting green that sits fallow at Bayside in Ogallala. I wish I had a photo handy, but for now I don't. The problem was of course, mowing and maintenance in terms of cost. I would estimate that putting green at some 10-11K sqft. They seemed to try it for a while and it was terribly scalped in the crests and thatchy in the lows. I don't know if Dave and Dan put the roll frequency too close together or too intense. It was an exciting idea that I hope would be perfected to a degree that it would be seen more.
MacKenzie had some things to say about the frequency of the rolls in true sand dunes, that are really the land form of water waves. He noted the length in the swales and the abruptness in the crests.
It would be cool if more city rec departments would see merit in providing Himalaya type courses for recreation of urbanites not able to enjoy full blown golf for various reasons. If they could provide say 25k sq ft of hurty gurty like venues and charge a modest $2 or something for twosomes every 2-3 minutes, providing some 18hole locations, and figure out a foot wear policy that wouldn't be too harsh on compaction and stress; perhaps even if they had to shut it down every couple months for a week of aeration and slit seeding, it might be at least a break even cost venture and a big boon to public recreation. I'd love to see some numbers run, which includes a park employee mowing and grooming it every day.