My fuel cost estimate is fairly old. We did the typical loop including Anegada on a 474 PC from Moorings about 5 years ago. Fuel cost at that time was about $320 for 10 nights including generator use. However, we cruised at 8 to 9 knots at all times. I'm from Thunder Bay (the city) located on the shores of Thunder Bay (the lake) on Lake Superior.

The entire group of BVI could fit into Thunder Bay. So we figured with such short distances, what's the rush?

Anyway, fuel cost will be one of the least expenses you will encounter chartering when you consider the other costs of flights, provisioning, booze (assuming you drink) and the boat rental.