Bill:
I think it is very doubtful that one golf course and a few more wealthy Americans would have changed Cuban history.
It is important to note that at the time of the revolution, Cuba was actually relatively economically advanced. But, Cuban history and the events leading up to the revolution are complicated. They are confusing in retrospect, and were certainly confusing to the US at the time....the Eisenhower and Kennedy administrations both struggled with what to do with Castro. Batista was corrupt and the US imposed restrictions on his regime, helping lead to his downfall. The US also initially recognized Castro's government.
So given all that, one has to question what would a group of rich golfers have done to change all that and when they would have taken action. It is doubtful they would have paid much attention before or during the Batista regime, and it is also doubtful they would have taken any action to prevent his overthrow. For the US government, private enterprise, the mob, etc...Castro's intentions only became clear months after the revolution...and I think many believe just after the revolution Castro himself was somewhat "winging" it so even those around him weren't sure what path he would take. I believe it was about six months after the revolution that the US decided to start plotting his downfall and obviously haven't been successful for half a century.
fyi....An interesting biography is Fidel by Tad Szulc.