Ed,
The thread is about putting a W/D in a half-bath, but specifically in a Vista/Sunstar 35F or 35B. What started me thinking about it was forum threads about replacing sofas with recliners, RV fridges with residential ones, etc.
Like you, I've read the threads about Splendide W/D's and issues with water and wrinkles, as well as long drying times. Per the instruction manual, the combo unit uses 7-18 gallons of water per load, so an empty 37F gray tank could be full after as few as 4 loads. Laundromats would be needed if there is no sewer hookup for an extended period. The instructions also address the issue of wrinkles, including suggesting removing and shaking out the laundry prior to drying. That's what I have to do with my S&B residential units, anyway. As far as longer time, I’ll be sitting under the awning sipping a cold one, so when it’s done, it’s done.
Loss of pantry/storage space has been mentioned by a number of folks as a reason not to add a W/D. For the 37F, the buffet might be a potential alternative, at least for some of the taller pantry items. That would mean fabricating roller drawers. The standard chairs weren’t comfortable for me, so upholstered dinette chairs on casters would take their place, which also would simplify buffet access.
Now that I’ve started to think about modifications, I’ve stopped blaming manufacturers for not offering what I want, which is essentially fitting features from a 38-foot coach in a 35-foot package. There will be compromises, but not a W/D or the toilet in a half-bath!