If you want to be able to watch DISH in HD on all TV's then you either need a receiver at each TV (Tailgater will not support this) or you need to add an HDMI splitter and run new HDMI cables from that location to each TV. That can also be done with a wireless HDMI splitter but that adds a pretty high cost. If your coach has a "box of many buttons" (BOMB) that allows you to select TV, Cable, Ant., Aux, etc. then you can run a coax to that box and watch TV in SD in the other TV's in the coach and an HDMI cable to the local TV for HD. The 211 does not have a coax output but you simply need to buy a composite to coax converter (Red, white, yellow output) and you are good to go. These are very cheap.