To recap. Basically it's a fantastic lifestyle. But there are ' perceived' risks. Which has never actually materialized in all these years but maybe one day could lead to some issues and or some value loss.
It's not as good financially as buying a concrete box but it's better than renting because at least some of your $$$ goes into an asset you can sell on. That being said buying a concrete box in the current market has some value risk attached as well..
Once you accept that - harden up and make the move - you'll never look back. Nobody ever leaves a marina cause they don't like it...