It ain't so much in how much the gravel costs (it runs about $5 a ton around here), it's in how much it costs to haul it, and the hauling cost is pretty much the same no matter if you get one ton or a whole load. The last time I think I paid around $290 for 25 ton of limestone gravel. That was a full dump truck load. Just have them bring a full load and dump it in some out of the way place on your property, then just move it around it as you need it with the Bobcat. I did have them dump half of mine at one barn and the other half at the other barn. They were nice and didn't charge me any extra because they were within 3 or 4 miles of each other.