As to elsewhere, how about around Punta del Este, Uruguay and the coastal areas of neighbouring southern Brazil, Rio Grande do Sol, being the states name. Very sandy coastal areas and P del E is supposed to be a monied kind of place - https://www.google.co.uk/maps/@-31.328656,-53.5648553,7z/data=!3m1!1e3
Atb
I grew up spending my summers in Punta del Este and go back there every year. Punta has a few problems for golf:
1. There are currently 3 courses close to the town, Cantegril Country Club (Luther Koonts and Emilio Serra), Club del Lago (Serra and Reartes) and La Barra Golf (Emilio Serra and Marcos Capdepont). The courses are busy in January and February, for summer season. Empty for 10 months.
2. Punta del Este has a very short season. Money is there mainly December 26 thru January 10. Season dies late February. Argentines do not travel to Uruguay after February and they comprise most of the golf played there.
3. Most of the Uruguay coast was divided in very small lots back in the 60s. There are only a handful of sites big enough for 18 holes on the coast, much less to hold housing that can finance the course.
4. A course would only be sustainable with associated real estate footing most of the bill.
There is a 4th private course, partially designed by the billionaire owner with some professional help and later some involvement by Angel Cabrera. No outside play other than a few private events. This is further from the town.
A course across the river, south east of Buenos Aires is a lot more feasible and would get play September through May, as it would get play from the Buenos Aires based golfers. Still, it would need a real estate development to pay the bill.
I would like to see Tom redisgn Club del Lago, though. 100% sand based land, with pine trees. No Coast views though, only lake views.