Comment by bombcar

Yep, depending on the lay of the land doing the grunt work can save thousands or tens of thousands - if you have the company do it they'll almost certainly bring in a crew of 4 or 5 with a underground "hog" machine that's supposed to work perfectly but doesn't actually so the backhoe appears and then they cut into a buried utility line that was marked but backhoes can't read and then you wait for the power company to come out and then they fight over whose fault it was while the freezer slowly drips onto your floor.

Or you can rent a ditch witch and do it yourself and dig by hand near anything remotely marked by the marking crew.