#16: The Barclay Brothers – Brecqhou

Island worth: $4.3 million

Meet the dynamic British duo Dave and Frederick Barclay, renowned as heavyweight real estate tycoons. Their remarkable journey took them to the acquisition of Brecqhou Island in 1993, an investment that has since ballooned in value to a staggering $4.3 million.

Yet, here’s the twist – Brecqhou is nestled within the jurisdiction of Sark, a picturesque part of the Channel Islands off the Normandy coast in France. Sark has an intriguing rulebook, one that prohibits the use of helicopters and automobiles. Undeterred, the Barclay twins are passionately championing a quest for freedom, fighting to ensure their ability to access their island in the lap of luxury.