One feature that I'm surprised no one has mentioned yet is a hanging blueprint file rack. These can be found relatively cheaply at Office Depot, Office Max, Staples, etc. One could also be homemade.

A hanging blueprint rack would allow plans to be stored unfolded and unrolled. It would also allow someone to hang new plans to allow the curl (or folds) to diminish before starting on a new build. And plans stored in such a way would make it easier to locate a specific plan. The best part is that a hanging rack takes up only wall space, and not floor or workbench space. (Glacier Girl will appreciate that!)

Harvey