I agree with the others. BVI very limited. Only one decent chandlery- in Nanny Cay Marina - that can get stuff down from West
Marine in the US, and a big Moorings base in Tortola to keep their
boats going.
Shipping from the US to St Maarten is easy and duty free. Both the big
Caribbean chandleries, have their warehouses there -
Budget Marine and Island WaterWorld (they both have online catalogues) There's plenty of skilled labour, and small marine businesses, but since the superyachts arrived its no longer so
cheap. I was getting quoted around US$65 an hour three years ago. I had
parts sent to The Mailbox, a Fedex agent in Palappa Marina, which worked well. No waiting for
customs, and they held them for me.
As you go further south, it doesn't really get any better.
Antigua is expensive, but does have skills, likewise the French Islands but they are suffering from the Euro.
Grenada may be an option and theres' also Trinidad, some people rate it for boat
repairs, but I'm not one of them.
Best Richard