We have the factory installed Kenmore. They are stacked, but are two separate units. The washer comes out on a roller. In your SB, it wouldn't need the roller mechanism.
The 110/120v dryer does take longer than a residential, but it's still much faster than the Majestic front loading units we had in the previous 5er. Plus, I'm not in a big hurry to fold clothes anywhooo.
As fulltimers, there's just no way we would be without. We are in a 30amp space now & I can still use the w/d. Thank goodness!