I like this idea, but I think the "step" shelves need some more support. Garage shelving idea: the lower shelves actually glide out so you can step to reach top shelved items. Then they slide back to the wall.
Classic Sawhorse Ive found a sturdy sawhorse thats great even if you have limited space. When Im done working with them I just stack them on top of each other and store them out of the way. Heres all it takes to build one horse: One 26 fo