Martha, you don't need a garage to use the rope trick. Any door way would do. You need a 6 inch C-clamp or larger. The pictures show a 5 inch clamp.
Of course you would want to protect the two ends of the clamp with some cardboard to prevent damage to the wall.
Clever! I like this. I have a door. I have a C-clamp. I have cardboard. I have a rope.