Just wondering about what you guys would charge to install white marble stone underneath a fence. The stone will cover about a 12 inch wide area roughly 100 ft long, 3 inches deep. The customer wants to use commercial black plastic edging along both sides of the trench. I told him 150 dollars plus materials. I figure about 5 hours at 30 dollars and hour. But then again never done a job like this and not sure how much trouble the fence will be. Thanks in advance.