Niall -
Clearly the golf course is now a major commercial engine for the town and even for the county of Sutherland. During the summer season, anywhere from 50 to 100+ local people could be working in some capacity at the course on any given day. The course now needs 30-50 caddies almost every day!
Assuming Coul Links does get built (and assuming it ascends to a top 25-50 in GB&I rankings), there may or may not be a "spillover" effect for the other local courses (Tain, Brora & Golspie). My guess is the tour bus crowd and the "belt-notchers" will come play RD/CL on day 1, have dinner and stay the night in town and play the other course the next day. Maybe some of them will be so taken with the courses and the area they will come back again to spend a week and play some of the other nearby courses.
But there are plenty of flats, apartments, houses, etc. that are rented on a weekly basis to visiting golfers and are heavily booked. As I mentioned earlier, there are 24 two-bedroom flats overlooking the 1st tee at RD now under construction that will be available for rent in the coming months.
Given RD's large non-resident membership, no doubt many of the weekly rentals are made by visiting RD members. But many of those visiting members bring their friends along to play at RD and elsewhere.
Just this past week there were 8 guys here from Minnesota. I think 3 of them are RD members. They come in May almost every year to spend a week playing at RD and the other local courses. They almost always bring along enough guys to round out two 4-balls.
DT
P.S. Even if the tour groups and belt-notchers stay in Dornoch for just one night (and don't play any of the other local courses), another 30-50 people having dinner there and staying in a hotel or B&B nightly is bound to have a positive impact on the financial well-being of the town. Whether that is enough to justify the building of Coul Links on that site from an environmental perspective is not for me to say.