I need to replace an old Directv Tivo (so sad) receiver. I have whole home set up for my other two HD DVRs through Ethernet connection to my network. When I replace the old receiver, I would be fine to just get an HD receiver and not a DVR as long as it can link into my network. But I do not have Ethernet running to this room, just a single coax line. Will this work as is, do I need SWM, or do I need to do something else? Looking for a lower cost solution. Don't need to fully upgrade my system with Genie or something. Thanks.