This isn't an historic frame. Many of those, I'm told, are taken down without paying anything for them, because the landowner gets his property cleaned up, and the taker downer gets to cart away the frame and materials. But that's not what you have. I guess the question I would have is, how much time would it take you to take it down, as compared to how much time it would take you to build it, because you know how long it would take to build such a strucuture. Dismantling the frame will be the easy and quickest part, I'd bet, if you get a crane it will only take a few days. My gut feeling is that it's going to take almost as long to take the rest of the structure down, if you want to save everything, as it took to build it. For example, taking the windows out so that they are reusable, will likely take as much time as it took to put them in.