Submarine

The occupants of a live-aboard submarine vessel would be able to use not only the breadth, but also the depth of the oceans as their home territory. Even the fiercest storms would be of no concern because the submarine could slip below the towering waves to cruise in peaceful depths. The sub could roam wherever its inhabitants desire....Various fish and other marine life could be hunted underwater. Other delicacies could be gathered on occasional visits to uninhabited islands and coasts. Drinking water tanks could be filled from fresh water sources ashore when possible, or fresh water could be made by desalination of seawater if necessary.

It must be admitted that the cost of setting up a submarine habitat could be in the very high range. Some small subs are available commercially, but they are too small for living abroad. And they are quite expensive. For instance, Perry Oceanographic, Inc. of Rivera Beach, FL, makes two to four person subs for prices ranging from $200,000 to $1.5 million. Up in Warren, Maine, George Kittredge is turning out a lower-priced model at prices from $12,000 up. But his product is a one person minisub suitable for use as a 'jeep of the deep' but not for living in. You can imagine what it would cost to custom build a submarine that would be big enough to live in for extended periods."

This is what Jon said.