Last time we went to the BVI it was with 8 people on a 40 foot cat and the total cost was about $400 for a week. There was a cost for the boat, and then per person per day. Then there's a charge if you want to use BVI park moorings. I don't have the breakout. If I had to guess... probably about $150 for the boat and mooring, and $250 for the 8 people. Just a guess.