Researching FL rental markets?

[Curtis Porter]

I'm seeking a second beach home in FL that I would rent, but also use when not rented on a weekly/monthly basis. I've traveled for many years to FL and am very familiar with the east coast (Space coast) between Cocoa Beach and Vero Beach. I'm really trying to find a beach area where I could plan on renters, regardless of the economy. Are there any good sources for researching which towns are best suited for this scenario?