Sorry about the oops on the cuttlefish. I understand the food supply issue. Barge is delayed until Monday. I guess you just have to plan accordingly.
If you get the chance, talk to divemaster Barb at Reef Divers. She originally came from Canada but has been living on Brac for many years. She used to work at the old Divi hotel dive shop before it closed and then she moved over to Reef Divers. She married a local and they have raised a daughter on the island. I am sure that she could give you good advice about living on the island and the housing opportunities (And she is very nice, too!)