Life in a RV is a bunch of compromises, between the lady and her dude, the lady and how she likes to do things, the dude and how he likes to do things. 4 wheel or not. Combo washer/dryer or not. How much room do you need for other gear vs stackables. Is the lady a fanatic about keeping things clean or laid back, saying, oh, we have enough clean clothes for today, what to worry??
If the lady MUST have stackables, then you need to find a unit that allows for them, if not, then - - -
End result must be tho, compromises that work for both and oh, make sure the lady is happy!
