What do you guys and girls think about this plan its just a rough draft with no plants, the black areas are beds green areas are grass. Here's the situation, where the deck is where the lawn ends into a slight drop off. What I will do is expand the lawn 1st by 5 feet. What the customer wants is 3 step plan 1st step is the first long wall 2nd is a lawn that is 2ft down from the first 3rd is another 2ft down to base level. The walls will be made of railroad ties and I will secure them with a T shape tie going into the lawn at least 4 feet and they will all be bolted together. I will put gravel and drainage behind the wall and then put soil over it. What kind of base do I need for the ties or can they just be laid on the ground? Is this design functional especially with the lawns down some steps? Thanks!