Then, when they're finished, they lay off the workers, say, oops we don't need this anymore 'cause we're downsizing, and sell the building for an obscene amount of money.
That's the only logical explanation.
Brooklyn is one of those places where real estate prices have skyrocketed in the past 5-7 years, with some properties doubling (or more) in value. It's interesting they are building living quarters there now, not factories.
Can you imagine what those waterfront (I'm guessing, but I bet there is at least a water view) condos will be worth on the market when they put them up for sale in a year or two? Who says the JWs don't plan for retirement? Someone at Brooklyn is certainly planning for their golden years. Hint: it's not the rank and file.