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I have never said there is no private property. I said that the idea of private property that extents on things you cannot carry around yourself is a (historically looking) new idea. Even today human tribes exist that would laugh at the idea that you can own land, a tree or a river.

Yes, and I'm sure @kafkanarchy84 will laugh at the idea that you can own a fridge filled with food, just as you laugh at the idea of owning people, or laugh at the idea of owning a cow, or a taco tree, or whatever else.

If all real estate is private, where it the orphan alloweed to stand? Where can he eat, drink and sleep? Where is he even allowed to speak?

If you expell him from your land, whose land will you be putting him on? Aren't you contributing to the violation of that others property rights?

He can't even earn without the permission of an existing owner... sounds like tyranny by the encombants to me.