Gough Island -40.350 -9.880 —91 km² ~ good ~ 10 people. Apparently this is a difficult island to bring a boat onto because the photos of the weather station show it to be perched on a high cliff. Much of the sea shore if faced with precipitious cliffs. The weather here when compared to such places as Bouvet Island is positively balmy.
Up the creek from the weather station is a pretty little valley where a small community could be set up -40.338 -9.919 that might be pleasant, and with a ready hillside for construction of the intended Lifehaven cave. Most locations have micro-climates where the weather is much better than a short distance away so it would be a good idea to investigate these local conditions before thinking much about an exact location. At present there doesn’t appear to be much in the way of resort potential for this island, because it is too cold for sitting on the beaches, and too rough for snorkeling, and hiking around an steep extinct volcano is basically the same everywhere. Even the bird people seem to have modest interest in Gough Island. All of these negatives for tourism are positives for Lifehavens. The photo below looks more rugged than it appears in the Google Earth 3D presentations.
This island and several others on my Lifehaven list are World Heritage Sites, and therefore are off limits to casual tourism. This is being done in order to preserve the habitat, and lives of various species. The Lifehaven project intends to cooperate with these efforts in every way possible, and intends to go much further than their currently stated objectives by maintaining a seed-banks, sperm banks, egg banks, animal banks, data banks, information banks, and every other type of bank that can be imagined and protected.