11. The Barclay Brothers – Brecqhou
British twins Dave and Frederick Barclay, accumulated their wealth in real estate.
This afforded them to purchase Brecqhoq, which is worth around $4.3 million.
This island is located in the Channel Islands, just off the Normandy coast in France.
The brothers are fighting for the right to use helicopters and cars there, which they’re currently unable to do because the island is located under the power of Sark.