Outside tv mod

I'm wanting some insight from anyone who might have done this if this mod is a good idea. I'd like to mount an outside tv bracket to the side of my fiver. I bought a portable tv mount with 2 brackets to allow me to move the tv from one location to another. I mounted one in our bedroom and would like to mount the other to the outside of the rv for watching movies outside. Essentially, this would enable me to quickly pop the tv off the mount in the bedroom and bring it outside. My concern is drilling a hole into the outside fiberglass and any issues this might cause. I don't want the hole and weight of the tv to start a delamination issue. Is this a good idea or not. There is an outside coaxial cable jack on the side of the fifth wheel so I feel it's there for a reason and someone must have done this.