Dennis.....I know you were on the fence for awhile about putting in the residential refer.....but isn't nice!
At least on Monaco coaches, which have a narrow door, the Norcold and Samsung can be removed/installed through via the front, once the doors are removed. On the Monacos, you need to disconnect the arm at the top of the door so the door swings all the way open, giving you almost two more inches. The front passenger seat needs to be removed to make the turn. It sounds like a lot of work, but really isn't. I've done two. The other was an Itasca Meridian and it fit through the front door too.
Both my Norcold and the one out of the Meridian were still working fine. We both sold ours on Craigslist for #350.00 each. This helps defray the cost of the $1200.00 Samsung.