"Watchtower was spending tens of thousands per year to New York City just to maintain their tunnel and airbridge spaces between buildings. This was not a tax, it was a fee paid because New York owns the underground and the airspace. Moving to Warwick eliminated these costly payments."
There are plenty of things like the above
https://www.reddit.com/r/exjw/comments/7ovq5o/watchtowers_decline_what_will_the_future_hold_for/