Of all he surveys, both

Rico says he has redefined his world, like Tom Bombadil:

"He is his own master... And now he is withdrawn into a little land, within bounds that he has set, though none can see them, waiting perhaps for a change of days, and he will not step beyond them."

Why? The reasons are varied, but are based on some prudence, some paranoia, and some things purely pragmatic. (Ah, where would we be without alliteration?)
The doubled vision helps the decision, because it makes everything harder, especially getting around. (Driving with one eye patched might be legal, but not easy.)
So, if you happen to come by the place and find it buttoned up, just ring the bell. Rico will happily see visitors, just carefully...