I have a customer who wants 150'x2' exposed retaining wall built 3' off his property wall along his future driveway. The home owners wife does not like an product like keystone or teko block she picked out a thin granite veneer which cost $324/ton 20 cubic feet in a ton what is the right way of installing this? The supply company just said bury 4" and dry stack the wall 2 stone deep about 12" and mortar the last course. I think I have to dig 3' done pour a concrete footing come up wit block then step t back to create a shelf and install stone the same as brick. Any help would be appreciated also any help with price would be appreciated I am think about $50/sf so about $16,000.