As we motored down Sproat Lake looking for good locations from which to photograph the takeoff of Hawaii Mars, we went through a narrow passage between sections of the lake.  Just south of the passage was a small island.  A closer look told us that there was a single house on this island.  The idea of your own private island does sound quite nice.  I think I would like the house to have a less obstructed view of the water but, maybe if you live there and see constant boat traffic like ours, the need for privacy makes the trees a better option.