Well, in my first post, I said 15 acres is what I thought was a good starting point and it's what has worked for me. Since then, a lot of folks posted all kinds of statistics about yield that sound like they came out of a college textbook that also teaches intensive fertilizer and pesticide usage which is just flat out unaffordable for small holders - so I thought I should elaborate my answer and bring up permaculture.

Yes, I have "actually managed it". I live it every day.