Marty: Do the road trip thing and keep it in Naples. My biker friend, Robb, has a place in Naples and his brother is like 3 streets away. Robb has a Volvo P-1800 wagon and Craig has a Fiat Spyder. Both keep them down there year round. When they're not there the cars are in one of those bubbles that dehumidifies the space. Robb's going on 12 years now with his Volvo with no noticeable rust (according to him... I have not seen the car). Besides, Your IM has A/C so it is PERFECT for down there and you need a car anyway, right? Why not go in style?
Food for thought.