If th coach does not already have a washer and if it is plumber for a washer you will not have much of a choice as to where it s going to goIf not plumber then there is ususally a location thet would have been where the washer was supposed to go. Again not much of a choice. If npne of the above every floor plan is different so now you are knid of on your own. Another decision to make assuming you have to have a washer is do you want a combination washer dryer or stacked unit. Stacked unit will take more space than a combination. As for desireability: DW says washer or no motor home. Now that we have a stacked unit in our current coach it would have to be same again. no combination unit. I for one would not mind spending some time each week in a laundry, but wife is driving this subject.