I'm pretty well versed in the groundskeeping costs and one of the cities that charges the most per day charges $100 per day per field and will put up and take down 200' fences for that price and groom twice.
I don't know what city you are from, but around here you can't even get just the fields, no maintenance included, for that price.
Remember a 4 gg is the minumum a team with play and not the maximum.
$ 3555 - Fields
$11060 - Umpires
$ 1560 - Union Field crew (required)
$ 1600 - Balls
$ 2000 - PAID Eastern Nationals Bid to winners ($400 x 5)
$ 1000 - T-Shirts to winners and runner-up ($8 ea x 10 teams x 12 players)
$ 125 - Insurance
$ 1200 - estimated expenses for misc. (permits, cleaning supplies, dumpster, trash bags, toilet tissue, security, etc..)
________
$22100 ($340 per team minumum)