I have an HDTV and an SDTV in my home. Sometimes I'm away from home in my RV traveling and my wife is still at home. I must have a receiver for my RV also. I don't think I can get two 722's when signing up for new service. At least, the online agent I chatted with indicated I couldn't. What are my options for scoring an additional 722 receiver for my RV? What additional cost am I looking at to get the second 722 for my RV? Thanks fellas......