I had the very same dilemma, trying to find a small vanity to put in my powder room (the space had a very inadequate, builder-grade (read: cheap) pedestal sink). We ended up going to Expo Design Center, where one of their vendors (Strasser) lets you custom-design your own vanity, with a range of sizes, styles, door types, stain colors, counter materials, sink types, etc. While this wasn't the cheapest option, it allowed us to get exactly what we wanted. Since nothing "standard" fit the space, it was worthwhile. The new vanity was delivered within about 3 weeks after ordering, and my husband was able to install it within a few hours (including brand new faucet, which we'd purchased separately). I will post a photo later. Here is a link that might be useful: Strasser Vanities

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.

We will not be moving the outlet box, the light needs to suit. I have found ones like this where we can "fudge" the location of the outlet box and re drill the holes so it looks as though it's centered. Thanks all for the suggestions.

As someone who moved into a home with a bathroom with stark white countertops (thankfully not in our primary bath), I think they aren't used as often because they show every smudge of toothpaste, hair clippings, mascara, etc - and your eye goes right to the mess. It's enough to drive you bonkers. At least with a little veining or movement, it distracts from the normal everyday stuff and prevents you from wiping the countertop multiple times each day. I've put in marble countertops in otherwise neutral or B&W baths before - it's actually a pretty traditional/classic look. I do like where you're going with putting some wood in there - it will add some nice warmth. Also, I think some places (although not Pottery Barn perhaps) allow you to order the vanity with no top. If you find one that is otherwise perfect, check the item options to see if that's a possibility. I'm very anti the afterthought 4 inch backsplash piece that comes with most vanities (I prefer to tile behind the sink), so I have taken that route in the past. That said, I would second the suggestion to consult with a custom cabinet maker (especially if the only thing stopping you is sample sizes - I'd imagine they could give you an entire drawer front if you really needed it!). The price is often negligible, and it provides you with more control over the numerous options that are clearly very important to you (I say that in solidarity as someone who is known for refusal to accept limited options!). The other benefit of going custom is sizing - a custom cabinet maker can build a unit to any width, so you can maximize the storage and counters to your space. They could also give you the two drawer/open shelf combination you're describing (although keep in mind those drawers may be limited to allow for plumbing for the sink). Another random source is Etsy - there are a few sellers who make vanities out of repurposed cabinets that might appeal to you. Check out CuratedHavenDesigns (I've had their "ornate bathroom vanity" listing saved for a while now - if only I had somewhere to put it).