I cannot envision a long enough swing arm to place that TV in a comfortable position in front of the couch that would allow me to watch a long movie without getting neck strain.
If I decide to spend some serious time watching the tube, and I do not want to rewire the trailer, I probably will just consider buying a universal tabletop mount and place the monitor on the counter top. To connect it, I could:
1. Use a long cable.
2. Use a device like ROKU to transmit wirelessly from my laptop.
3. Use a wireless HDMI transmitter.
For now, I will probably just use that area for a coffee stand.