For grandma I would get something really simple such as two 311 receivers and order two easy remotes but you have to ask yourself if your grandmother is tech savy at all, if not then all your going to be doing is giving her a headache wich well intentioned children and grandchildren giving retired parents and grandparents satellite was a common trouble call that I dealt with. If grandma isnt tech savy then your going to spend atleast a month on a daily basis helping her to learn how to use it and to make sure that she leaves the tv itsself on channel 3. The only way to avoid a 5 receiver fee is to get two dual tuners and a single, this will leave you with two additional receiver fee's but you have to have both dual tuners connected to a working phone line to get what your looking for.