my idea was to configure the routers with a hotspot function that will limit the bandwidth or configure a data allowance per day/week/month. Users might decide to factory reset the router to get around that limitation and use the default SSID and password as it is etched into the routers.
If there was an option for a router to install the latest backup after being factory reset that would be great, since I can't be there to oversee when a router goes offline all the time.
obviously routers without the proper configuration can be configured from RMS, but by then the users might have already consumed huge amounts of data, so I had hoped this could be automated somehow. I'm not sure this is precisely what I had in mind, but thank you for your thoughts!