I harvest mine. We go out or send the kids out, collect them up in a bucket and resell them. Even at .25 cents each, they sell fine to those folks practicing their strokes. Grampa gets a BUCKET full for Fathers Day, Uncles get a milk bottle full, they are VERY happy to see them.
Neighbor has a workshop and builds custom clubs, re-does older clubs with new grips or modifications. He has his customers try out the clubs from his back yard. I find it TRULY amazing how the balls all seem to HOOK RIGHT, going INTO the prevailing wind and end up in my fields. They are in the woods, barnyard, field ALMOST to the next road!! I have seen him out picking them up from the neighbor behind himself, but with my electric on all the time, he usually doesn’t sneak over to collect them from my fields.
We just do NOT DISCUSS it with each other. He knows I collect them up because they disappear. He has NEVER asked for them in about 10 years. They have just missed me sometimes out in the field, when they rain from the sky. He is usually a not-bad neighbor, just likes to mow a lot, cut down the large trees in his yard. Does the suburban thing, fertilizing, seeding, ROLLING the lawn, but MY yard grass LOOKS nicer!! It drives him quietly crazy because I don’t mow the grass very short, protecting the roots, never fertiize or roll the dirt. We don’t burn the leaves, they get mowed on the grass or collected and shredded onto the garden areas. He LOVES to burn stuff, ditches, yard waste, PILES of leaves that are huge, which wastes all those nutrients and leaves big black, ash spots on the lawn that he reseeds. Things are better now that his kids graduated, are not on the Golf Team at school!! Much less practice time hitting, so less balls in the field.
So if I was you, I would collect the golf balls, KEEP them, give them to friends or sell them cheap to pay myself for the time collecting. I also find collecting them to be REALLY a PITA, but don’t like them in the fields either. Gallon plastic milk bottles work VERY well, just cut out the screw on part for a slightly bigger hole to drop them in. Bottles hold quite a few, easy to store until you want to get rid of them. I know daughter made good money for a couple years from a guy, he just went thru a LOT of golf balls for practice. Then he moved away, so selling has been slower.