I have an HOA that has a center island just as you enter the neighborhood which is approx 2500 Sq. Ft. (250 ft. long X 10-12 ft. wide). They want a bid for removing the current mulch and grass, which there isn't much grass at all, and a price for installing RIVER ROCK in the whole island. There are also about 30 small bushes and 15 ornaments grass in the island, all of which will need removed. I will be using a bobcat/front end loader to remove everything and to place the river rock. Any help with this bid and bulk stone conversions would be greatly appreciated. Thanks. Hopefully this was enough info on the job!