I'm giving an estimate tomorrow to install a field stone retaining wall. The wall will be about 80' at 8" high. I estimate I'll need atleast 2 pallates of stone. The stone with delivery will be about $500. Normally I charge about double the materials cost for hardscapes, but this project will not take more than one day (probably 6 hrs.). Should I charge $500 for labor for a days work? What would you all do?