From what I have seen, having a property is a lot like having a physical body. It must be groomed, fed, watered, tended to, mended, etc. It ages, parts wear down, it starts to make creaking noises. And what's more, you have a limited time with that body. Eventually it dies. As to your question, it's getting to the point where the only thing capable of taking care of a property is a corporation, and unlike people, corporations don't die.