Your last statement was right-on. The quality of the wall is only as good as the quality of the mason. Without knowing a topnotch builder, I too would not attempt this project. I wonder if you could excavated along the back of the wall, construct your wall with the appropriate sized stone...
when dealing with volatile minerals (ie limestone) several environmental factors must be taken into consideration. Is the construction taking place in a cold climate area, is there many voids in the rock, is the rock close to a road where much salt would be used in the winter. Limestone, when...