I have a stone wall I need to put a number on. I figure double the price of the material, stone, soil etc. Do you guys also add in a labor charge on top of this. I figure it will take about 2 - 3 hours. It is going to be 8 ' x 8 ' by 16 ' long it is going to be backing an existing berm. It will be 3 stones high the first being buried half. There is little travel time involved. I will be using estate stone. Any suggestions will be appreciated.