How many acres would a person need to go feral?

[Rain Man]

I was thinking the other day about cattle, and what a pasture must look like to them. When you're a rancher and you open the gate for your cattle, they're essentially walking into a field of pizza, right? Their food is just lying there on the ground for them to take, and it's food that they really like. I guess more accurately, they're walking into a field that's mixed with pizza and broccoli and the occasional cookie, but that's fine.

So that got me thinking about how cool it would be as a human to experience this, and I suddenly realized - wow! That's how it was for humans for 99 percent of our history. We got our food by walking around and finding it. Sometimes it was on a bush or in a root and sometimes we had to kill it, but the truth is that for most of our history, the world was a big buffet and we wandered through it with a fork, a spear, and an atlatl.

So that got me thinking again. Could a person do that now? We talk about living "off the grid", but that's kind of a fiction. People living off the grid are still importing goods from civilization. They're buying canned goods and shotgun shells and Netflix videos. They're using agricultural techniques that were developed in Mesopotamia and optimized in Kansas.

So instead of that corrupt modern version of "living off the grid", let's go with a purist approach. You've got XX acres of land, and after a polite ramp up period to get it ready, you're going to be a hunter/gatherer. No growing crops allowed. You're going to wander the woods and valleys and plains, and you're going to hunt creatures and pick berries from wild bushes, and drink from streams. You'll only make clothing and tools and cups and netflix videos using local sources and materials. Nothing enters or leaves your property, ever.

How many acres of land would a person need to do this? I'm considering it as my next career.