Suggestions-self sufficient mini farm?

We’re thinking about starting a mini-farm. We’ve already got chickens…the easy animals. Next, we plan on getting a milk cow, meat cows, and maybe a pig or two. Am I missing an animal that provides staples (ex. milk, meat, ???). I feel like I’m missing something major.
Also, we’ve got the vegetable garden and fruit orchard going…but just learning about grains. We live in Southeastern U.S. Any suggestions on type of corn/wheat/soy etc. for milling?

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