Back in my younger days, a buddy of mine had a condo on a golf course, about 150-200 yards from the tee, with a slight rise between the tee box and his place. You could see the tee box from the 2nd floor balcony, so we would station someone on the upper floor, and someone downstairs at ground level. When a foursome would tee off, we would have time to run out and move the first 2-3 balls around without them seeing us due to the little hill. The favorite was to take the best shot and throw it way back up towards the hill and hear the guy beech about how he just knew he hit it further, wind must have caught it etc. or take the best shot and wing it on down the fairway, and hear the boasting to his buddies about the "drive of the year". Sometimes just snagging a ball and seeing how long someone would look for it before giving up was pretty good too.:icon_mrgreen:
You could also play the 4 holes closest to his condo without the folks in the clubhouse seeing you, so, if there was an opening in the schedule (nobody about to tee off) we would play a 4 hole round, college kids didn't have 40 bucks for greens fees.
As far as the OP, its typically a premium here, anywhere from 50% to 300%+ more than off the course lots.