We have four farmhouse style sinks in two different houses, and all present the same problem. It doesn't have anything to do with the material as two sinks are concrete, one stainless steel, and one composite stone. With the two kitchen sinks it's very frustrating spraying out the food particles from corner to corner. Food particles go from one side to the other, and it's very difficult to corral them to the drain. The two concrete bathroom sinks don't have enough slope, so when shaving and brushing teeth, the water and material flow to the opposite side of the sink. It's annoying to wash a 3' wide sink every time it's used. And gross if the sink isn't cleaned from side to side after every use. As a compromise, we're installing a farmhouse concrete bathroom sink with two drains and more slope. As I evaluate many things in life, a, farmhouse sink is a solutions looking for problem.

hi we have about six months ago now, re done our bath room , similar size to yours, and , i can take some photos and email them to you , we have maximised space, and walls , put in a white stone bath under the window , it is a metre in width , with a cool water spout coming off the centre under the window we pu t afalse ledge in to sit , candles etc on , , we tiles floor to ceiling, off white , wall mirror cabnit with three mirrors , inset into the wall so its only sits out a we bit from the wall tiles , floating bath room vanity , so that it makes the floor space look bigger , . matching stone square basin sits ontop of the vanity to one side so plenty of room to sit all your bath room stuff when need be , seperate shower all tiled as well , with inset , shelves for shampoo etc, also , when you open the bath room door and walk in when you close the bath room door behind it next to the shower is a very narrow floor to ceiling shelvec for towels, now the hole is there we jaust havent got the shelves put in yet. , we gt loads of comments as the bth room dosent look small evn though it is , , most expensive item the sqwat extra wide stone bath , made to order basin / tap ware and shower spray thing ,oh and the white stone vanity which we had made to order as well , due to the sizing .

considering all the other advice here's some more suggestions. ..showers are 1200mm x 800 - 900mm, three handbasins would each be about 700-800mm wide but, custom made with a single top and three small drop in sinks there would be more available counter space, matching mirrored wall cabinets would reflect light from wide, above door height windows on both sides with a solid timber hinged door and security screen (although a sliding door is the neatest and most waterproof privacy would be a problem and frosting the glass more expensive and not very private at night)...the best option will be the one that suits most of the users most of the time but it would be a shame not to have external access and there's plenty of space and so many possibilities

the last option with shower and toilet either side of the window and hinged entry door opening towards the laundry cabinet... hinged door is cheaper and offers more privacy and solid core hinged doors will improve sound reduction and the back of a door can support extra towel rack and/or clothes hooks and the tall window needs only be same as top of door height (about 2.1m) and if necessary simple hinged doors on the laundry nook will use the least space and are only open occasionally