Agree with TD. I have mentioned this before, but years ago, had a new public course and renovated private course jobs in the same city. The public course spent $50K per year on sand bunkers, raking 3 X per week, and the private spent $250K per year on sand bunkers, raking, edging (with scissors!) 7 X per week, and replacing sand more often, etc.
And, in reality, with 66% of the US courses being public with average greens fees, I suspect many use the "less than perfect model" but of course, we don't discuss those courses very often here. Not to mention, for some <$30 courses, maybe even $50K is too much to spend.
BTW, I have seen reports of proper bunker liners saving $50K per year, with one Midwest Super pegging his overall savings at over $100K per year, figuring all the washout days his green, tee, fw mower guys transferred over to bunker repair, delaying some maintenance. I thought that was a bit much, but he would know.