Hi first off let say this help is for me. I don't do landscape. I am putting up a pole barn and I had to bring an escavator in to level the ground because it droppded about 35" from front to back. The building is going to be 24X32X10. The escavator mentioned that i might need a retaining wall on one side and around the back. What is the best and most cost effetive way to do this. Any help would be appreciated I am posting some pics of the area. also he said I should wait till after the building is up and concrete poured. Any input on that would help also.