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.