Right now the rabbits are my main concern for home feed production. After your first comment, I started asking around and I've ordered a book specifically on growing and producing a balanced rabbit feed. I'm goin to be working on that as my next project. They're costing about $100/month to feed right now, which is a killer. That's with feeding a bunch of babies though, so it'll go down a lot shortly.
Being able to make a complete ration at home will be a real game changer in the rabbit operation. Even moreso if I can save seeds from whatever we end up needing to grow, but we'll do it one step at a time for now.
The reasons I'm wanting to focus the majority of my own efforts on the rabbits is because they're here to stay. The pigs likely won't be a permanent fixture, maybe every other year. And the chickens don't need as much feed as the rabbits, so even if their feed cost goes up, they still don't cost a lot to maintain.
Kinda my thinking at the moment.
Read book. Plant seeds. Make food for food. Eventually get free food.