Only 10 years? Hmm...
This money is most likely already called for. Running that operation must be a HUGE expense. Think, if they were to stop having assemblies, for instance. They would likely starve. Not only that, but how much do you expect their new cult commune Warwick project is going to cost, even with free labour?
What would be nice to see is them not being able to build it quick enough, or not having the budget to finish. Will they ask the JWs for money to help build it? We're talking about a huge project here. Personally I see it as a big mistake. I hope they crash and burn.
They're cashing in on their properties while they can. They have a negative world view, especially in regards to the future. Look at how many branches have been sold or closed in the past 5 years.. They are tightening their belts. Perhaps they fear the next recession will hit them hard? They have a huge increase in overhead coming, and it would be a shame to be stuck with the Brooklyn properties when they want to sell them during the next recession.