Check the fresh water system very closely and carefully. Last year I tore up the teak and holly floorboards with a demolition saw to replace the water tanks. He thought they were corrupted, and they were. Every water line, fixture, water heater, pumps, you name it, I replaced it all!
It wasn't cheap.
Of course that ten thousand dollar water maker needed new plumbing.
Outside of that, I really like the Island Packets!