I'd be doing a self-install kit. Comcast specifically used to say if there's a problem and it turned out to be a problem with my internal wiring, they'd charge for a visit. In any event, do the Roamios have two coax inputs? I have a coax drop in the living room and a coax drop in the master bedroom. I'm assuming that the coax runs from outside my home to the living room and then up to the bedroom. So I would connect the Roamio in the living room and the Mini connected to the drop in the bedroom would "see" the Moca device in the living room, the Roamio?