I don't feed raw at this time, but I do cook foods.
I cook in huge batches, so I have an 18" wide mixing bowl for combining ingredients. (It's so big, my cat can sleep in it with room to spare! I just use my hands to mix the meats with the grains & veggies because I don't have a utensil big enough to move all of the ingredients around. (My dogs don't mind as long as I wash my paws first!)

Even with such a large bowl, the ingredients are ready to spill over.
Several years ago, I told myself that since I've always cooked largely from scratch, that I would invest in two high quality kitchen appliances. I chose a food processor and a stand mixer to splurge on.
I like my 11-cup Cuisinart food processor for processing vegetables or pureeing chicken for my kitty to supplement his small-brand canned food.
For mixing the dog biscuit recipe (doubled or tripled), I like my 6-quart KitchenAid stand mixer (professional model), using the dough hook. It's a huge monster of a machine, and it has to stay on my counter, but it's been so good to me that I don't mind at all! I posted the biscuit recipe in the Homemade Treats thread.
I also bought a set of heavy-gauge stainless measuring spoons and measuring cups because I was tired of the cheap ones that constantly bent under pressure.
And yes, the huge stockpots are great for cooking in large batches. I found a "Visions" (Pyrex?) monstrous clear purple/maroon cooking pot with the lid for just a couple of dollars at a yard sale, and I use it to cook the dogs' rice or oatmeal. I considered this a great find!
I also use my 7 quart crockpot to cook pounds and pounds of chicken at a time.
It's also worth it to pick up a freezer (fairly modern for energy savings) for storing extra food or stocking up during meat sales. Sometimes, I buy 60 lbs. of chicken when it's on sale...
Pardon me. I have a whole small turkey in the oven for the humans (and puppies & kitty, too), and it's time to check on it. Brock! Brock!
I've always cooked in double or triple batches and have frozen items. It's just easier if you're cooking, have everything out to begin with, and going through all the labor... to cook multiple batches and freeze (or can) the extra.
HTH.