I'm pretty sure they are transitioning to a cyber church.
First thing I thought of when I started reading. Just have everybody sign up to spend a few bucks on an internet subscription or something similar. It would give HQ absolute control over what people see, read and hear. I'm not sure how they'd work in field service, I imagine they'll find something.
Edited to add; based on average costs in the North East US I would guess they'll spend about a billion dollars getting it built. That does not take into account any work done by slave labor "donated labor."
If they sell off all the Kingdom Halls in the developed countries they will have BILLIONS of $$$ to pay for it all.