On my previous class C, I kept a small TV on a stand for setting on an outside table if there were any events I wanted to see live. I had about 20 extra feet of coax cable rolled up behind the bedroom TV. Whenever I used the outside TV I would just pass the coax through the window. That way I had satellite, park cable, or the amplified antennae signal whichever I was using on the coach.
I had planned on ordering a new 3170DS with the outside TV, but when I was finally ready to buy a really clean 2013 on popped up. As much as I wanted the outside TV, I couldn't justify the price difference.
I thought about trying to install a mount on the outside wall, but the thought of drilling holes makes me a little queezy. Even if I did put a mount on the wall, I would have to figure out a way to run a video cable.
I will probably keep the same outdoor TV on a stand and pass the HDMI cable from the cabover TV out of the window.