alternatively ...
since you're already running a moca network, you can extend that with additional moca adapters instead of powerline adapters for places where wifi won't reach, if that's still a problem ... additional moca adapters will do almost the same thing that the powerline adapter will do, give you an RJ45 jack/connection where none currently exist without needing to run additional wire provided there's a cable outlet nearby. And since you are already creating the moca network with your tivo, you won't need a pair of moca adapters, you should only need one where you need the extra connection because (if?) the wifi won't reach it.
What type of router are you running? If you are using a modern one with multiple antennas, radios, etc, have you tried just relocating the router to a central place on the first floor in the center of the house? If you do that, it might just cover the entire house.
-David
Last edited by LIH Prem; May 14, 2016 at 8:45 pm