There are a lot of ways to get into the golf business short of being a golf pro. You could be a blogger, like me (although there’s not much money in it—certainly not enough to quit your day job). Or run a golf store. Or a groundskeeping business.
In Minnesota, a guy named Scott Lokken dives in ponds for golf balls, and then sells them on Ebay. He works 5 days a week, scouring the bottom of the ponds of 35 courses. On an average day, he extracts 5,000. The course gets a cut and the rest, he sells on Ebay.