Thanks for the replies.
My intention would be to flush mount the unit and typically there is plenty of room assuming the mount is ~4" thick or so. I suspect though the AC duct would need to be modified.
Some coaches I looked at a flush mount was a option that was not purchased.
If I use my current coach as an example wiring would be simple but the mounting location would inhibit entry when lowered. I can't see that as a problem since it would simply be raised when not in use or just duck under. Space wise, it looks on the surface I could easily fit a 42 or 46" flat screen.