Man I wish I had that much space to work with... Now granted I am going into my second year with the Haunt here in Fairbanks, I find that you can transition how ever you want, whether its going into a house or a swamp or factory... As lng as the story flows. I have been to so many haunts where there is now flow, its just random room after random room because they thought it was scary. There was no story behind it.
I had so many people asking for more history and story on my haunt because the flow of the story in the haunt worked really well. Good fiction is a lie that can be believed...
But it sucks on the zoning... To bad you can't go to court and get the zoning on the property changed. I also have a list of state requirments that a good amount of state Fire Marshalls use as a guide. If you want it, PM with your email and I'll send it to ya.
Best of luck Brother
“Remember though, your best weapon is between your ears and under your scalp -provided it's loaded.”
― Robert A. Heinlein