Fruits and veggies is entirely optional. I only feed dogs, but I have 4 large breed dogs to feed. I haven't figured it out on a monthly cost scale yet
I will crunch some numbers and get back to you.
We feed them any good quality meat- though I don't grind it at all- not worth the time investment for me. I feed them meat on bone, cuts without bone, and organ meat. I also add in unsweetened yogurt (optional), omega oils (hemp), eggs and the shell as well as any fruit or veg that I have in season, and in stock. They get fruit and veg maybe twice a week?
I also add acidepholeus myself, and sometimes I give them fish.