Because homes here are elevated, storm water usually passes underneath rather than into living space. What still needs protecting is everything at ground level.
What actually floods
Ground-level storage and garages beneath elevated homes, lower villa units, and equipment enclosures. That is where a pump earns its place, rather than protecting a living floor that is already above the water.
Salt water is harder on pumps
A pump handling brackish flood water corrodes faster than one dealing with rainwater. Specifying for that, rather than fitting the cheapest available, decides whether it still works next season.
Backup power is essential on a barrier island
Storm surge and power cuts arrive together. A pump with no battery backup is off at exactly the moment the water is rising.
Test before hurricane season
Pour a bucket into the pit and check it starts, clears and stops cleanly. Two minutes in June is worth a great deal in September.