I want to get a start on a large area for my Sulcatas. This is going to take me some time but my goal is to have it complete by spring.. I want to use the retaining wall blocks so that I have a strong permanent fence that improves my landscape as well as providing security for our dinosaurs Because I have multiple Sulcatas, I’m going to have multiple areas. I’m using the attached pic as a reference for what I’m planning but I’m not sure how high my wall really needs to be. I would love for some advice, ideas, suggestions... I was going to buy the first pallet of blocks today but I need to be sure that this is the best way to go because it won’t be easy to change once in place.