I had unlimited range time in college. Spent hours a day on that fukker, just raking balls. Hundreds daily. Easily for months at a time. All summer, every summer for sure. Probably 4 out of 7 days a week, just raking balls hours on end.
Sad thing is I never learned how to swing properly, as that open range was my first experience with golf, so I spent 10,000 hours ingraining a max ceiling of mid-80's golf game. Boooooo.