I want to build a retaining wall the length of my backyard and place a fence above. The wall height will range from a foot and a half on one end to about three feet on the other end. I want to keep the cost down and was thinking of using retaining wall blocks then putting the fence up just behind the blocks. The only ploblem is my fence will no longer line up with the neighbors fence and will sit back about eight to 12 inches from theirs. I don't really have a problem with this but I was wondering if there are any other low cost options?