I'm sure you'd be able to find a rental, construction companies rent them more often than buying, so there's usually a rental option not too far away from anywhere. They come in various sizes, and most the roof units are on wheels, and can roll sideways on the roof, so you can move them and do multiple drops pretty easy. Safest, most efficient way to do that insanity.
At least you're not doing a water tower, the ones you use for those are really small, and really sketchy. Our installers have always been a little hardcore