When I was having my esophagus inflamation, I tried making cabbage juice but my flimsy juice maker required me about 1/2 hour to make one glass of juice. I just bought a huge industrial sized juicer.
(Waring Professional Juice Extractor, $100 at Sam's), but haven't tried it yet. It's big enough to throw whole apples into. I should use the cabbage pulp to make saurkraut.