Would probably prefer V4:
Dryer and washing machine can be placed side by side on a pedestal. Above that is space for a shelf for detergent, etc.
However, doing laundry in the bathroom is anything but convenient. Where do you want to hang or fold it?
Where do you store the laundry until you have enough for a full load?
With V4, you could probably integrate that into the aforementioned shelf. With the other versions, it gets difficult.
Overall, though, I don’t find it nice to integrate washing machine + dryer into the bathroom.
But if that’s the only way to get it upstairs and otherwise you would have to put it in the ground floor or basement, I’d rather die with the washing machine in the bathroom. After all, it’s only the kids’ bathroom
