I have a backyard that needs some serious help. It has a lot of potential, but I just don’t know where to start. I live in the Outer Sunset in San Francisco, so I have some challenges associated with the yard. Gophers, sand and slope. The entire backyard is 80’x20’ and the massive sand hill is sandwiched between a wooden deck on the east end and a concrete patio area on the west side adjacent to the house. I only have a standard sized door to access the yard, so no heavy machinery can enter. I have all the time now to work on it and could use your help and ideas. Also, my retaining wall appears to be leaning. Thanks so much for your help! Attached are some photos.