I had the exact same problem. I picked out the vanity I wanted but did not think about the fact that it wasn't made to sit flush against the wall. I spent a month looking for something else, but in the end we decided to go with something shorter and have it not be against the wall. But we were going from 72" to 60" which is probably not workable in your mom's situation. I did find a lot of vanities that did have flat sides and could work in a corner, if you are willing to have the countertop fabricated. They just need to not have any trim detail on the top or bottom like the one you picked out does. I would just look at the ones without the pre-made tops. Because the pre-made top will still leave you with a slight gap because of the countertop overhang. This is an example: Avanity Modero which is sold everywhere, not just at Lowe's. The cabinet we ended up buying is an Avanity Madison which won't work for you, but I assume it is of similar quality. We are pretty happy with it. The drawers and doors have soft close but I do feel like the glides in my Ikea kitchen drawers are better quality. It is very pretty and I wanted a stained wood so I am really happy with our choice. If I had been willing to go with a painted finish, I think we might have stuck with the 72" Modero.

Pocket door for sure, is this the only bathroom in the house? I would never have a bathroom with 2 access points so if the only bathroom I would close off the bedroom access and live with the fact there is no ensuite . If this is an ensuite close off the hall entry .Then your layout looks fine. Good lighting is the next thing to address and I like lots of good lighting in a bathroom that includes over head pots and a couple of over the mirror Halogen 150 watt or the equivilant LED fixtures the pots on one switch the over the mirrors on another.This is one of my favorite fixtures for above mirror it is called Oxygen halogen is very afforadable and I think Lowes carries it in the US.I like your idea of the dark floor and shower floor just remember the shower tile needs to be smaller than the floor tile so make sure the tile you choose comes in the 2 sizes.I love the inspiration pic.

I agree with Cpartist"s layout and like moving the closet over as suggested by D M so that bedroom 3 has easier access to the bathroom. Do you have room to have the toilet face the tub and add a linen cabinet next to the toilet? How wide is the tub toilet area?

The sink and tub are going to be painted and I’m thinking of doing the floors white