You'll need security. Set up in a location that already has security patrols, like many malls do. Make sure you tell the security office you will be there and the hours you're open/working. If you can, have someone stay on the property overnight inside the fencing. If you have any friends in the police dept. see what they can do, it makes a different for sure and in or out of uniform.
Weather damage, not much you can do there. Make sure you have things installed very secure, ratchet down any outdoor facades and use strong ratchets too. Keep sensitive electronics or animations away from the sides if you can, in a more secure part of the house fully walled in. Plan for the worse and hope for the best.