Fair enough Driving Force. My apologies coming on harshly there.
I'd estimate they maybe have 40,000 physical buildings. Estimating the market value per property is where its a crapshoot. They generally build in bad locations simply for cheaper land. Of course the X factor is how many congos are in 1st world countries vs the rest of the world.
That being said, that property is not liquid. Sure they can sell off based on orders from the CO and build in another area for whatever reason they pull out of their ass. But the GB isn't cash motivated, they are power hungry. As long as they have millions worshipping their every word they just need to keep the ship afloat til they die.