Installers for Ring Access Controller Pro?

Hello -I live in a place where 2 homes are behind a single gate in front of the driveway. It appears that the Access Controller Pro could work for our setup but I had a few questions about how it works, and also who could install it.I called their support line but the rep wasn't really able to answer any of my questions or suggest any installers. Does anyone know how/where to find folks who have installed these? We live in the SF Bay Area in case it helps. Thanks!