I have a shelf around my studio at 6' height. It is wide enough to hold paintings but too narrow for the cats. I put small nails (10 so far) at the bottom of it to hang my small oil studies. I put tape on the back of each panel sticking out about an inch and I hang it with a paper clip. I can hang three panels per nail that way, so 30 panels at a time. I use the top of the shelf for everything else.
This is my easel setup with paintings hanging from the shelf and some framing tests on top of it.