David - I had a nine hole golf course and as soon as I could not buy more land to make it 18 I sold it. Commercially they are complete disaster. In commercial terms the worst 18 hole course is almost better than the best 9 holer. That aside your course is there now and 'commercial' is not really important although clearly you need to raise the profile, alternate tees perhaps even greens all add interest, you can do no more than just make it the best course you can, your best strength to play to will be the golfers nearest you, its hard to fight the 18 v 9 syndrone and in many ways its a hard question to answer the exact reason why having 18 holes are so important, the GCA crowd will definetly prefer 9 holes with intrest over 18 with lesser intrest, sadly your till wont reflect that.
Adrian, thank you.
We're fortunate that our super maintains the course well, and that 87 years in it still has interest to the area. I can't see another 9 in the cards; the course fills a natural bowl next to a river.
I'm very interested in the 18 v 9 question and the underlying reasons it exists, as they will play to any recommendations I make. I have a few theories
Choice theory; people like more choices, 18 or 27 holes, even if they don't intend to play them all.
Fixed cost theory; the fixed personal cost of a golf round, making the time, packing the car, driving to and from, warm ups, etc., isn't worth it unless there are 18 varied holes played.
Bigger is better theory: no explanation needed
Quality theory: 9 hole courses are just inferior, period
Most of the approaches around multiple tees and greens attack limitation 2, with some success. I think with appropriate promotions this objection can be challenged for many.
On 4, about quality, we face the same challenges on quality all courses do, but worse. The quality markers are against us: par, slope, rating, top lists, etc. 9 hose courses tend to fare poorly here on external quality markers. Too bad there isn't a "Small Luxury 9-hole Courses of the World" association, or a Top 100 rating that could be used to drive interest.