The nicest marina is Port Louis and they are not overly expensive for
dock queens... But book early if you want to be there for the
hurricane season.
The rout down from the BVIs is about 160 degrees. It would be nice to start on a north Easterly. Just keep up to windward as much as you can, playing the
wind and the
current.
On the rhumb line if you need to put in a tack just do it, but you will probably be too far west of islands to get much shelter from them.
Its only 450 miles and all quite warm and a few days to windward will be good for you