Quoted from bdPinball:If I were a bachelor, Like I said, the'd all be upstairs with me. The house is secured to it's pilings with some sort of Metal clips of some sort. An engineer friend of mine looked at it and gave it his blessing. I'm not worried about the house. I'm several miles from the gulf.
I have the same concerns, and your post has me thinking.
How about hauling them upstairs when flooding is eminent? The easy way would be to use an Escalera, but those are expensive, and large for keeping around.
I like the idea of the winch at the top of the steps:
Some discussion -
https://pinside.com/pinball/forum/topic/moving-games-up-stairs