I recently purchased a large exhaust fan that was still on the roof of a building. It only weighed 500 lbs but cost me $2,500 to remove it. Because I am going to use it myself, and it was never used while sitting on the roof I wanted to make sure it wasn't damaged during the removal, but still, it cost me that much to remove just 500 lbs. Imagine what it will cost to remove several tons if it is a large unit. Your talking about an all day event with people who are professionals and have experienced installing and removing these types of units.

Scott