I am looking at a retaining wall job for the side of a driveway. I have to remove an existing one ( concrete block ) and the owner would like a stacked type wall in its place. I can estimate the removal etc , but how can I price the new one as a quesstmate for his budget purposes. I do not need to be exact as I know the selection of the retaining wall stone will be a factor in its price. ( I am referring to the type that has a split type face and steps back and interlocks each course ) Thanks for any help. Mini man The wall is 6 foot high and 25 foot long.