A washing machine needs a dryer, and a dryer needs a vent. I 'd consider getting a KD in the area, and an alternate location for both appliances as well.

In Europe most people have W/D one piece units that do both jobs . In this case I think the toilet needs to go beside the sink that gets moved to the left to make room for the washer where the toillet is or the washer goes to the right of the moved sink and the toilet stays where it is

Europeans love to put their dual use washer/dryer unit in the KITCHEN...under counter. It is a favourite place for it. Often at the end of a row of cabinets or beside the dishwasher (if they have one). This is normal and full accepted - even in a high end "society" apartment.