We are being asked to clean a very large car dealership in orange county New York. It needs to be deep cleaned, We are to bring our own equiptment, and cleaners. No waxing of floors just normal things, trash bags, dust, vacuum, 4 bathrooms, waiting area, main glass doors, cobb webbs, showroom floor to be dusted and mopped.offices and desks to be dusted and vacuumed. Is there a square footage price to go by or an easy way to estimate?