Problem Extending Airport Extreme

Please accept this suggestion as well intended. Buy a modem and use an airport express as your router. Modems are about $70 US, and the payback is less than 2 years.

I don't know Spectrum specifically. My experience with Comcast is having their device modem/router opens your connection to be a public hot spot. Anyone with Comcast credentials can sign in using your connection. There is a claim it doesn't impact your speed, etc.

My concern is more "tin hat" and Legal. I don't want the potential hassle of what could happen if someone signed in using hardware in my house to do illegal activities. Yes, I'm leasing it from Comcast. Yes, it's in my house. Goodness knows what could happen with Legal fees for defending myself and the more nefarious civil forfeiture.

Given the choice a two year payback (versus something I likely won't have to worry about but I am concerned) I'll take the midterm money savings. It will also save you time getting your connections up and running. There was a time I enjoyed spending hours "cracking the code" to getting my network up and running. Those days are gone.