If you want good financial advice from Jehovah’s witnesses observe what they DO and not what they say. Does the Jehovah’s Witness organization own Kingdom Halls, bethel facilities, and speculative real estate in high end neighborhoods?
Kinda looks like they do, so individual Jehovah’s witnesses shouldn’t criticise home ownership. If the payment is similar to what you would pay in rent you should buy the house. Some markets the payment is considerably less than rent so it’s a no brainer.