Good point. If you're not from a Florida coastal area you may not realize that the insurance is broken into three components -- hazard, windstorm, flood.
Hazard has been pretty steady. The hazard portion of the insurance for our 2,000 sf house near the gulf is about $1,000.
Flood varies widely depending on your flood zone. It can be as low as $320 or so a year up to many thousands a year. You have to understand your risk before you buy.
Does CBRA mean you can't get federal flood insurance? If so, run don't walk!! The main portion of your policy expense would be flood, and that will never change. Let it go and let the bank tear it down. I'm serious.
The windstorm portion is what has gotten really wacky since 2004. You definitely need to see if you have options outside Citizens. I always thought if you are close to the Gulf, Citizens will cover you for windstorm only and you have to get separate hazard and flood policies.