I have bought land, a piece of Earth. It's only 172 acres (100x72 metres). I think it is enought to grow everything I need and it is not too much to be free and not busy.

If I would get less than 100 acres, I would not be able to grow enought for myself. In that case I MUST buy everything that I need from other people, so I am not FREE.

If I would get more than about 200 acres, then I would not be able to keep an eye on everything. In that case I MUST use power of other people or machines (technics) and again I will depend on them, I will not be free.

So I bought aproximate amount of land which enables me to be free. In other posts I will write more, why do I think that 100-200 acres is best amount to be free.

And now I will answer to Phil Mitchell's comment about permaculture.