dsp: BTW I thought this was interesting background, even though it's a bit old:
http://www.marketwatch.com/story/heres-how-much-your-company-pays-to-rent-office-space-2015-05-27
...if it is combined with the knowledge that Brooklyn's largest landlord was the WTS:
...the largest landlord in Brooklyn Heights and vicinity—the nonprofit Watchtower Bible and Tract Society of New York, the Witnesses' business arm...