The problem with owning buildings and facilities is that it takes cash flow to maintain and operate them. You can't just buy a building and let it sit. It seems the WTS biggest issue is surrounding a lack of donations. Remember they said not too long ago that they spend more than is coming in.
So what if they've decided to change their strategy on making money. Instead of investing in tax free real estate, they invest in other vehicles. We know they are involved in the stock/bond market. We know they go to hedge fund conferences, etc. Why not switch your model to be less reliant on real estate and more on otherwise passive investments. It's riskier but it's liquid and doesn't require cash flow to maintain. You just have to pay the advisers which is much cheaper than running a factory.
Just a thought.