Well...Pirate here...been busy for a month or so...
You can choose about any location you want on the bedroom wall for the TV.
Then take a piece of 1/2" plywood or OSB and sand the sides nice an smooth and use "toggle" bolts to attach it to the wall.
Then depending on what size TV you want, go onto Amazon and select at good wall mount kit. Like this one: https://www.amazon.com/Fortress-Moun...=tv+wall+mount
The key is that you can add as many mounting bolts to the plywood to hold the TV solidly in place when traveling. There are some wall mount kits that use a rather small footprint attachment to the wall...wanna find the TV on the floor...get one.
If you want a swivel mount, this is one I used for our 42" in the living area:https://www.amazon.com/SIMBR-Mount-B...ll+mount&psc=1
Again, notice it has a large footprint attachment to the wall. You can add as many fasteners as you want.
I'd also recommend using toggle bolts through the wall mount, through the plywood and through the paneling. Just gives you that much stronger attachment...and you can't have too much with a TV.
And if you aren't familiar, toggle bolts: https://www.amazon.com/Hillman-Group...s=toggle+bolts
And I would use 5/16" bolt size. You can get them at your nearest Ace Hardware or big box store.
For power, hopefully somewhere on the wall you want to mount the TV is an outlet. Mounting the TV over the outlet is the best. Doesn't have to be centered over the outlet...just over it. With the power shut off, remove the outlet plate and you will probably find there is no typical wiring box in the wall. Just an open hole and an "RV style" outlet. Have no idea where to get one.
So when I've added or changed one, I use an "old work" backless wiring box and a residence type outlet.
Go straight up from that outlet to behind where your TV is going to be mounted and, using an "old work" box, trace the outline and cut a hole in the wall. From the new hole fish romex matching the original outlet size, #14 or #12. Now you can connect the new wire to the original outlet and have an outlet behind the TV. If you're going to want a DVD player, DirectTV box, whatever, you might want to put a four plex box behind the TV.
Don't know what you have for TV, but we have DirecTV and the Genie HD DVR. That makes it very simple to add a wireless video bridge and mini Genie box and then no HDMI cable to try and fish though the walls.
If this isn't enough...lemme know and I'll answer as best I can...and I've got this figured out pretty well!!!