With as little as 1 acre.
But do you really want to do the work? Right now it sounds like you’re romanticizing your childhood.
Having cows and horses comes with an unrelenting schedule.Crops fail. People get hurt. Bodies get old. Feed costs $$ unless you can grow it yourself. But even then you have to have equipment and seed. It breaks down. And so much more.
But it’s free to dream about it anyway.
We have an acre, and it’s a lot of work. Only pipe is the gated stuff. Start while you’re young. We love it.