A free standing unit like this doesn't have to stay by entrance. It would fit nicely between windows in slide-out portion of your main room. Both sides could be decorated. One side as shown, and other as an office chalkboard vertical wall for example.
This is a mod we did for our pop up camper, tried it for the 1st time this past weekend. We used a pool noodle for a gutter system to help channel the water condensation from the A/C unit away from our canvas ends.