Renovations cost significantly more than new construction. https://www.remodeling.hw.net/cost-vs-value/2019/

We like having a water closet also. If you end up building a 16' vanity, which is enormous, you could build linen areas on either side and a pull-out laundry. If you want a centered sit-down make-up area, you could have that also. 16' is a huge expanse of space to work with. The top parts of the linens/towers could be set-back if you want, or flush with the rest of the vanity box fronts. You could have loads of drawers, no need for a small linen next to the shower. Save that spot for towel hooks or a bar and/or perhaps some nice art. I have a tower, and so if you decide you want them, have your fabricator make you 2 extra pieces of stone, with the same edge profile as your counter, and place them on top of your main counter, then your tower sits on that. It's like placing your tower on top of a cutting board. I learned this from a designer who showed pictures on HOUZZ of water-damaged towers because over the years, water will eventually damage the wood. This way, your wood tower is just so slightly elevated from your main counter, and it will not get damaged by water over the years. You can also put your electrical low, turned sideways and outside of the towers, so that you don't have to have it in your backsplash, wall or mirror. And you can put electrical inside to charge toothbrushes, razors and such. For your laundry area, it can be a pull-out, or a tilt-out. If you are having custom cabinets made, your cabinet builder can make the laundry area look like real drawers, like my picture above. The other side can be actual drawers and provide you lots of storage. In the middle you could either have a make up area, or another bank of drawers. I don't have a make up are in the bathroom, but I think people usually drop the height down for that area if they do it.

@tartanmeup, the other thread was for vanity size and design. I was not sure if I can add tiling qs to that thread🙂. The bathroom update was a necessity as the cabinets are falling apart and vinyl tiles are peeling off. I was gonna replace the bathtub with standing shower too but she advised against it. So doing the minimum update to make it presentable.

This might be super late, but first I would think maybe you should consider hiring another professional designer, because this layout seems tricky/problematic. Secondly. Is there any way you would combine the soaker tub function so that it can also be a shower? Or minimizing the dimensions of either the shower or soaking tub (I’m thinking of Japanese soaking tubs). I also can’t imagine that if someone looked at this layout, it would do anything for re-sale even if it makes the current owner or you very happy since you’d have to duck and weave just to go from toilet use to washing your hands. As far as minimizing shower dimensions, you could have a standing shower with a glass panel to keep water from straying too far. If you make it curbless, then you can squeeze some extra space out that way for walking in and out of your shower. I imagine your floor will all have to be waterproof anyhow with the freestanding tub. Here’s a very bad drawing using my notes app. 😂 Good luck! The most important thing is that whoever ends up living with this bathroom loves it!