The large scale part won’t be possible without some type of network control.

The super easy way is replacing the DNS at the router (in the DHCP config) with some public, ad-blocking DNS. But you need access to the router’s config.

You can find very cheap routers with default credentials in the wild.

I’m pretty sure it has to be way more than $5500 for the 512GB model. By boss bought a couple (older models) to run local inference at work, and he paid like $20K each.