I wonder after 3 years of work on something like this how do you protect and/or insure it from fire or mischief as only one example? Security wise seems to be

I wonder after 3 years of work on something like this how do you protect and/or insure it from fire or mischief as only one example? Security wise seems to be an issue making something like this so public (although I can certainly understand why you would want to show what you have built.)