System for managing thousands of small distributed networks?

This is mostly an exploration into whether such a system exists for our need. We have hundreds, soon to be low thousands, of small residential networks that we'd like to have some sort of central control over. We aren't looking to link all of them together, but we would like a way to manage WiFi network settings and possibly some routing/protocol settings (mainly blocking things like Bittorrent) at each location in a centralized and organized fashion.

Each location only needs to have a residential-quality small network; nothing more than a standard wifi + router combo is needed. Is there any system out there from the big networking companies that's designed to manage a large fleet of small networks?

My mind initially went to Ubiquiti, but I don't think their Cloudkey system is up to the task. Even if we ran it on a big AWS instance I don't think I'd fully trust it; I've seen some flaky behavior from them before and I wouldn't want to put all of this infrastructure under that single point of failure.

We already use Rently to manage some devices at our locations and that has worked pretty well for us; their API integration lets us do things like control smart locks programmatically, and I'd love to see something like that for this use case.

Any tips on where to look for something like this?