This luxurious listing, as highlighted on the realtor.com YouTube channel, is the pinnacle of privacy and an income generator, all in one. East Sister Rock Island is just off Marathon, FL, and is available for $11.7 million.

Here’s your chance to lay claim to your own private island—and potentially generate some income at the same time. East Sister Rock Island just off Marathon, FL, in the Lower Keys, is available for $11.7 million. For a buyer in search of true isolation, there’s nothing like it. A buyer won’t simply acquire this dreamy speck of land surrounded by azure waters. The fact the buyer will technically own several acres of sea floor between the mainland and the island is also unique. On the man-made island, there are two dwellings: a main house and a guesthouse.

Published reports say the original builder created the island by digging a moat and drilling into the coral rock. The listing dates the home to 1980, a time before there were strict environmental laws. Nothing like this could be built today. Inside the main house, there’s a large kitchen with plenty of seating and prep space. It opens onto a dining area and living space.

The guesthouse accommodations are more rustic and offer a single bedroom plus a small kitchen. Outside, there’s a pool designed for quick dips, as well as plenty of protected ocean areas for snorkeling, fishing, diving, and other aquatic adventures.

As far as utilities go, the entire island is self-sustaining, with solar and wind power, plus a whole-house generator, cistern, and septic system. Access to the mainland is just a few minutes away by boat. An owner could also opt to chopper in and land directly on the island’s helipad. The current owners have owned the island since 1995 and have used it as a highly profitable vacation rental. Prices range from $10,500 per week on up to $16,500 a week during the holidays.