I once saw an Digital painting very similar in concept to this. It was a single ship upside down with a wrap around roofed deck . misc wreckage was added on to form a captains quarters on top overlapping the keel. The masts and various rigging attached to be used as cranes to lift booty from arriving supply - dingies . Shark in a pen in the lagoon for security. It was a cool concept as is Yours. I saved it for inspiration but I never got around to mapping it out and Now I have seemed to have misplaced it. I have more misplaced and mislabeled stuff on my computer than I do in my head ! Looking forward to see how this turns out !!