The easiest and cheapest thing to do is to take the Direct TV receiver from your house with you, and buy a portable satellite dish from E Bay or a local flea market, and leave that in the motor home. That's what I've been doing for years. I've also found that it's so much easier to set up the dish for Direct TV, than it is to do the same for Dish Network.
2014 Itasca Spirit 31K Class C
2016 Mazda CX5 on Acme tow dolly- 4 trips ~ 5,800 mi
Now 2017 RWD F150 with a drive shaft disconnect