Hi Jean, I live in West Palm Beach, Florida, 1/2 block form the ocean. I have potected my instruments by having a dehumidifier and an air conditioner in my music room. Because of the tempture here the air conditioner is used often so there is very litle damage.
As a piano technician I find stcking notes, and rusted strings on the pianos there are not cared for. They sell units for pianos, organs, and all types of music cases which will eliminate most of the humidity.
Live wherever you wish, then create the protection that is needed.
On the down side, because I live near the ocean, I have replaced front doors three times, my tools if not cared for will rust, and the sun-roof of my care had to be replaced. And yes, I would move here again.