What does sand cost?
We are blessed with pure tan coloured sand and so don't need to bring any in, but I am assuming it is reasonably pricey? What does it cost to fill 100 bunkers.
Depending on where you are in the U.S., new bunker sand can cost anywhere from $20 to $100 per ton, delivered to the site [but not installed into the bunkers]. If you have 100 medium-sized bunkers, here's the math:
250,000 sq ft = 27,778 sq yd
times 0.16667 yds deep = 4,629 cubic yards
times 1.3 tons / cu yd = 6,000 tons of sand
Which puts the cost of the sand for 100 bunkers at somewhere between $125,000 and half a million. Add in "architecturing", new drainage, bunker liners, and labor, and you can see how these projects get up to $1 million sometimes.