Bellona Island is off the grid in the SW Pacific. The 5,000 inhabitants are of Polynesian descent and trace their ancestry back more than 25 generations. Solar power, rainwater catchment and a supply boat from Honiara once a month. Cash is really only needed for a few basic staples such as salt and sugar and yeast with the latter two being required for mixing the local coconut based home brew. Buying beer makes no sense. What do you do with the empty cans? Any foodstuffs readily available from the island is shared around so there is actually no need for a central market. There is safe accommodation available, no malaria and you will likely be the only traveler there... welcome to the Solomon Islands.