Many reasons to use an RV over a motel room for me.
-Meals are way more convenient, cheaper and healthier too. Can be fun to do as well.
-Not too many motels allow a campfire by the bed
-Much more quieter than a room
-When I open the trailer door, I am immediately in my 'living' room, instead of a hallway that leads eventually to a sidewalk.
-I can carry WAY more gear when travelling with a trailer
-Much more pet friendly
-Nobody else (but my dog or wife) has farted in my bed.
-My wife and me can eat breakfast or snacks whenever we want, and do not have to go out to do so.
-My dog is raw fed, and has all his food in the fridge
-Cold beer at the ready, or a bottle of red on hand, or a rum..........
-I meet way more interesting fellow travelers when in a campground
-I can often fish out of my campsite, not many motels offer this.
-Guitar playing is much more fun outdoors, and often brings other fun people around.
-Motels discourage playing bocce and other similar games in the hallway
-Much nicer to read a book by a babbling book than in a room
-Our dog definitely prefers hanging around outside, rather than inside a room.
-And on, and on, and on............
This is not to say that staying in a motel room is out of the question for me. We still do use them for appropriate situations, including destination holidays. I have lived for 4 nights a week in a motel for over 10 years, eating in restaurants, and really got sick and tired of it. There were a couple sketchy motels I have stayed in that I worried about cleanliness, but for the most part I have been very happy with the level of service and the conditions of the rooms.