When I cast, I run 2 20lb+ pot on either end of the patio table. When one runs low, I fill it full of ingots and switch 2 other pot. Can cast a LOT of bullets that way. With a hotplate between them, I've always got hot molds ready to go. And prewarmed ingots too.
I like that production method.
I'm not greedy, and don't cast thousands upon thousands, because I don't get a chance to shoot thousands upon thousands - and never enjoyed just making noise and emptying brass, but I DO have to cast as efficiently as possible, because my casting time is limited and often interrupted.
Currently, I run one of two 10# LEEs at a time, and occasionally both at once. They both need "work," and maybe I should upgrade to 20# pots and do what you do. I love that idea. My bench is already way too big and this would make better use of the space.
EDIT: BTW, My casting bench is one of two almost identical benches in my garage. 30+ years ago, when I put down roots at this particular habitat, I had four 36", fire-rated walk-through doors to dispose of. Renting a hopper was too expensive, so I made two benches from the doors. One door is the bench top and another door is the back of the bench, leaving me with a back-stop so that stuff won't roll off the back. It's ideal as a casting surface, but 36" deep benches are too deep, especially when you have short legs and T-Rex arms. 24" deep would be better, because shhh....TUFF accumulates toward the back, and I don't like accumulations other than stacked firewood, canned goods, wheel weights, ingots and assorted containers of bullets, powder primers, brass,.... But they exist, I don't owe money on them and they work, so...