I can not speak to other sports but as far as baseball in our neck of the woods goes; all field work is performed by the team, and the coaches. The cost associated with additional clay, or turfis, or baseballs, unpires and equipment comes directly from funds earned by the booster club, concession and parental fees.
The only fixed cost that I can see is electricity to run lights. And I would think that it would be possible to schedule the games they are intent on cutting to Saturday when lights would not be needed.
As far as resurfacing a track, I have never seen it done
. But track and field events are usually scheduled at a central location aren't they or does one school compete against the other? I thought that Track events were "meets" where several schools competed at the same time.
I know lights are expensive, but I believe that there would be support for assisting with the cost associated with running them.