Mike,
I love natural rolling golf course design that have a raw feel to them. This type of golf course is muchmore affordable to build especially if you have great property. What I have found is that residential courses range from $6M to $10M to build. This is just the golf course, cart paths, irrigation system, grassing, sand, etc...
Now when you plan a development and tell property buyers you are building a golf course they also expect:
Golf Clubhouse $3M - $7M
Golf Maintenance $1M - $2M
80 to 100 Golf Carts (Cost Varies)
Turf Maintenance Equipment Lease (Cost Varies)
Infrastructure for roads, utilities, drainage, sidewalks, landscaping, etc...
ROI is a combination of finding the right property in the right location at the right price points and then doing everything you can to add value to that property. The design, planning, architectural style, golf course designer and amenities like pools, marina, tennis courts add to the value of the project.
the difference between a project like Sand Hills or Friar's Head is that they want a great golf course nothing more it is a retreat. In our business models we create golf course to make more money on homesites that would be located along golf holes. A wealthy guy or group of guys building a retreat really don't care about ROI as much as break even. On the other hand, we would never build a golf course if operated in the red. A golf course if done well is a very calculated investment that becomes a key component to a community that enhances the land features. When a potential buyer drives onto the property and sees the golf course the just stop and say wow that is really pretty.