By the marks on the side of my cooking pot it looks to be between 8 and 9 quarts. Closer to 9, I think. You could definitely do a half-batch. The only thing I wouldn't split in half is the pork gravy. At first I wasn't going to use it* (pork gravy? ick!), but omfg that shit is a
revelation. Now I'm thinking of ways I can incorporate it into some of the Mexican dishes I make. I'm going to try it in a mole first, but I can think of a few things that would just be that-much-mo-betta with this stuff.
*only because I wasn't using sausage. I did a chicken/shrimp version.