For a house that size, I'd say go for the Tri-Band system. Also tell Spectrum you don't want their wifi anymore... Get a regular Cable modem from them and hook up the Velop Tri-band main node to that modem - Then plug in the remaining two nodes halfway across the house from the router and base modem - Don't put them too far or they won't get the source connection. That's typically the problem with extenders is that people put them where they NEED coverage, instead of where they can GET coverage. Once the remote nodes (totally different than extenders BTW) are connected, they'll bring that WiFi signal to the harder-to-reach areas. I have used/reviewed both the Dual and Tri-Band Gen 1 and Gen2 Velop systems, and they are the state of the art in simplicity and coverage.