I cannot recall where I found the instructions online, but I found a design for a fairly cheap space-saving workbench I built from one sheet of plywood and whatever dimensional lumber I had around. Added a section of wallboard as a top and kept the channel to act as a blade passtrough if I were cut stuff with a circular saw on it. Later on (no photos unfortunately) I added stabilizing legs that folded down so you could really lean on it if you had to. The downside is of course, the stability of the narrow base and just how clumsy it was to roll around. After a while it turned into the 'put all my junk on it' table so it was unceremoniously scrapped late last year.
