When I was thinking of doing this my trailer being aluminum skinned I had a real problem trying to find wall studs where I wanted to put the TV. The refrigerator was on the other side of the wall there was just no way I could think of finding a stud. I did not want to miss the stud from the outside you just could not clean that up.
I ended up setting the TV on a small folding table near the outside 110 outlet. I ran a coax cable from inside the TV cabinet through the floor and over to where the TV sits on the table and installed a panel mount Coax outlet.
I use a portable satellite from Dish 99.9% of the time so it's satellite only. Would have been just the same to run Coax for park cable and air TV antenna.
I have the mount if I could find the studs I would install it. The TV is a 32"