You'd probably want to leave an inch on either side of the pair and an inch between them just to be on the safe side. The standard model they give me on the layout program is 30" wide, so with those dimensions side by side is a no go. With your dimensions and adding the 3" of wiggle room, that would put you right up against the 24" deep countertop running under the windows. So it could be done, but you are pretty much locked in to that size washer and dryer from then on. I like the idea of putting the rack in the pantry style closet--that's what my mom does with hers. Another thought is to do pullout hampers. We are doing 3 sets of them. They are actually tall trash pullouts, but they will allow the kids to go ahead and sort their clothes when they bring them in to the laundry room & I can just load them in the washer. I like the idea of the shelves for the clean clothes baskets too. We did the corner sink and it looks great. We used a single basin stainless undermount large D-shaped sink. You would not believe the space in there and I don't have to worry about it staining or yellowing or cracking like alot of the "laundry sinks" out there. I've attached an 'under construction" pic for you of our countertop & sink. I don't have time right now, but I'll work on some elevations for you with some additional ideas.

Mine is unfashionably (who knew) combined as well. It's one of the most-used and most loved rooms (by me anyway) in the house. My issue is that it's only about 8 x 13 and I had lived in the house part-time for a year when I reconfigured it. We walk through to garage so it serves as side entry. There's a 7 foot open hanging space for coats & jackets adjacent to the door, storage for ironing board and place to hang things that air dry. Along the unbroken wall I've got a d-shape sink (not large enough in retrospect), 1 drawer bank, a wine fridge and washer/dryer all under a 13-foot stretch of unbroken counter. Above I have a 13-foot row of Ikea upper cabinets for overflow dish storage and other things. That counter is major -- everything goes on there. In retrospect I could have done without the wine fridge and had another bank of drawers. We really need a secondary closet downstairs. I find I need to change clothes in there when I go out to the garden, or if I'm around in house sweats and need to run an errand it's handier to change down there than run upstairs, come down, forget something, run back up YKWIM. I have an indoor/outdoor carpet in there that gets vaccuumed super well. When there's ironing, an old sheet helps with the floor issue. Fortunately, I used porcelain tiles in the whole back hallway area. Those are bulletproof so the floors are not an issue even with mud. I find the combo room super handy. I just would love to have it 3 times bigger with a huge bank of drawers so that the summer stuff could be stored during winter and the reverse. Plus I'd love to have a wall with really good light and storage for the sewing machine, mending accessories etc. Without seasons there would be much less pressure on that room in re storage. As for making the rooms separate, I'm one of those people who wants fewer and more efficiently configured spaces. I don't want to run from room to room. One the best spaces I ever had was in a rental house. The owners was an artist who had winterized the attached garage and converted it to a studio. It had big tables, bookshelves, storage plus a separate outdoor entrance. It was big open space and just great. So I'd be very happy with a multi-purpose laundry/mud/sewing/utility/closet/project room as big as the garage. Ha.

Update: another option is to move the 2 lower cans in mudroom up a bit so they are symmetrical around flush mount with the other 2 cans ...

I am not a guru but I can give you my opinion. Melanie on the regrets - while trying to minimalize them they still will happen! Flip side is you will likely also have some grrr that ends up turning out different but BETTER than you imagine. IMO stealing the foot makes it much more functional so I would do it in a heartbeat but I am not the expert. It also opens it up and will 'feel' better. I think that's a good spot for a broom closet and charging station and should easily stay tidy. It is about 5' wide yes? That is a nice size space. Measure what you have you want to store in there and then look for pics of what you are thinking. Utility sink in the garage - really in the winter there isn't much dirt and when it's exposed it's frozen too so I'd think the utility sink would get more use in the spring summer fall when it's thawed so I'd keep it on the table too. My opinion - your money. Ha! As far as 'enough room' - it sounds like your kids are younger based solely upon still being in the 'add more' season of life. :) I can tell you only to think seasons, think sports, cleats, basketball shoes, church shoes, boots, hiking shoes, tennis shoes, flops, bats, ball caps, backpacks, lunch boxes, water bottles (if you have girls think even MORE shoes and then purses - ack)........ I will say for my 2 the space we have is more than adequate and it's quite roomy (I just double checked and it's actually 6.5' on a side so each person has 3' plus). That said we also have a closet near that I put off season stuff in and dog food. Winter coats and snow pants and boots are not in the locker area all year. I put them in the closet over spring/summer/fall. As long as you have a spot for that I think you are fine. Off season can closets can always be in the basement as well. There are always sweatshirts hanging and ball caps. Besides that there is always a stray nerf gun, goggles, flash lights and what have you hanging out there. I don't mind it there - it's out of the way and not underfoot! Old house it used to be in their rooms and all over. We had no designated space for outdoor wear anyplace besides bedrooms. If I am feeling brave I will snap a real life pic of it in action. It is easy to pick up and look presentable when needed but typically M-F it's a dumping spot. I like an open bench vs doors because we do use it to sit down to put stuff on and take stuff off regularly. And when our parents come and use that entry they love to be able to sit down to put on and remove shoes. It's comfortable and useful. With your window placement in the bathroom and the exterior door you will find it a nice light filled space. Our exterior door there is 3/4 glass and I love how it lights the hall. It is never a dark space.