Tiki,
You apparently missed the point of my question. I’m arguing it costs MORE to host months of coventions than it does to ONE large convention in a rented facility.
JWs would also have to pay more for maintenance and upgrades due to increased usage. Rented facility owners would have to cover that.
Besides, it’s just more practical to use your own facilities than it does to rely on people who can tell you “no” if they don’t like you.