Moving...but....

Hi Ring,Still loving the products and plan but have a complicate question. We are building a new home and will migrate the Ring buddies to the new address eventually. Once moved we will be selling the old home (eventually) and would like to keep one main ring device at the old address to monitor driveway access. 1- how much internet access with one video device require to function as internet will be reduce to a minimum to keep costs down?2- once I reconnect the other devices to a new address will it mess up my account, having two locations?