You are buying addition possible viewing places so your usage of a licensed product increases, thus the extra charge. For two tv's a VIP 722 would work as it has a second tunable output (no locals.. only dish). That's what I use for 4 tvs. One main HDTV, and 3 TV's, only one gets used at the same time with the HDTV, all get SD feeds along with a mixed (via a backwards splitter) OFF air signal. I have DISH on CH21 on the second output, and pick up 16-1, 16-2, 21 (dish), 22,28,31-1,31-2,31-3,31-4,38-1,38-2,43-1,43-2,43-3,43-4,44-1,44-2,44-3,56-1,56-2,56-3,64-1,64-2,64-3 and the dvr. I receiver charge and one dvr charge per month. Would I like to toss more receivers on this? Sure, but the monthy charge I do not need so this works. I am using CH21 as it spits with a cleaner ANALOG view, than the default ch 60 does.
I'm in the same DMA as you.