When we harvest an animal, we try to use as much of it as we can. Besides the meat, the bones can be used to make soup or broth, and then given to dogs as chew toys. Also, the hides can be tanned, or so I hear. I'm in the process of learning that skill more fully right now.

That's highly efficient self-sustainability. I'm pretty sure you will be able to achieve that goal in the next few years.