Here are some details:
425 feet long, the height = 6 ft
60 feet of the wall will be higher - 8 ft.
22 feet will be brick (to match the house at front).
6 ft gate at back side.
Important: water should drain well through
There is no footer, so they'll probably need to pour a new one. Don't know about soil condition. Right now it's a yard with grass on it, it was a new construction site..
As for 10-15k.. It's per different calculators found on the web.. and per common sense. I don't believe it should cost that much. Unless they're trying to bill us $500.00 per hour... But maybe I am wrong; that's why I created this thread.