Enter Dollarama. I found a plastic desk organizer for $1.25. (Pay no attention to the newspaper... I enjoy using the singles ads in the back of the paper as a desk protector... every so often I will paint a mustache on a model.)
I realize the organizer will only hold three canvases at a time, but really, how many more can I work on simultaneously without going mad?
Now with a little twine I found lying around I anchor it to a shelf...
Perfect! I have room for one or two more. I'll probably install one more just in case I need the space.
Anyway, I know it's not MENSA material, but I always love to share!