Pete,
I am not really talking about say, a club who looks at the costs of maintaining a fairway vs. rough. I don't necessarily disagree with you that just continuing to maintain rough is probably, in net present terms, similar to that of resodding grass.
What I am saying is that if a course were to be built tomorrow. There are 2 plans, one with big fairways with lots of options, and one with narrow fairways, only having maybe 2 options, does a club look at that and say, "It's going to be too expensive to maintain all that closely cut turf."
In strict operational terms, the cost of treating, watering and mowing rough, versus the cost of treating, watering and mowing fairways, which one is cheaper? Do clubs look at this? Do clubs that are just getting a start look at this?