Shame that you require planning permission to live in a temporary structure on your own land and they almost certainly won't grant it. Could very easily be nicer than living in a van and in many places cheaper - at least until you spend extra on optional improvements. Could even grow some of your own food as you have vast amounts of land instead of the back of a van.

Such bullshit that it's illegal to go and live in the woods. Maybe I want to become a mountain man, only going into town on rare occasions.