On the opposite side of that wall is the closet in the 2nd bedroom. I could easily cut the wall and drop in an access panel. That is more plumbing work than I feel comfortable doing myself. I like to experiment and learn to do things on my own. But since when I shut off the water supply, I shut off eight units in total, I don't want this to be a learning experience that inconveniences my neighbors for a long time. If I do that, it can wait until I do a complete remodel in my master bath and have a plumber here. I've got that planned for another year or two. Thanks for the tip though writersblock!!! And trtsmb, I do agree with doing a linen closet or hutch with a smaller vanity. But I need suggestions or pics for ideas. I'm not sure exactly what.

Here are some looks to consider. Ignore the side positioning in the first pic of the side mounted lights, it's for reference only. If you go LED and are able, put them on a dimmer. https://www.lumens.com/rondo-bath-bar-by-maxim-lighting-uu460546.html#prefn1=Style&sz=96&prefv1=Transitional&cgid=21&&tileIndex=16 https://www.lumens.com/dresser-wall-sconce-by-visual-comfort-VISP158059.html#prefn1=Style&sz=96&start=192&prefv1=Transitional%7CClassic%20%26%20Traditional&cgid=21&&tileIndex=72 https://www.lumens.com/milton-road-bath-bar-by-visual-comfort-VISP158086.html#prefn1=Style&sz=96&start=480&prefv1=Transitional%7CClassic%20%26%20Traditional&cgid=21&&tileIndex=11

Omit the cabinet in the middle, Instead have 8" deep mirrored recessed cabinets over each sink. You can also have the tower cabinet on the end go up to the ceiling to hold extra supplies that are convenient to have in the bathroom but are accessed infrequently, like extra rolls of toilet paper. Yes, that cabinet will be ample to hold a laundry basket. Where do you have in mind to hang towels? I have a similar setup for my vanities. Two 36" sink bases, with an 18" drawer base between the two, and a linen cabinet on the end. Where you have the 12" deep cabinet, I have a magnifying mirror flanked by towel rings for hand towels. Mirrored recessed medicine cabinets, with mirrors inside the doors, open to the left, for the left cabinet and open right for the right cabinet so that I can see the back of my head.

I'm going to agree with two mirrors, and add something that goes against conventional wisdom: I think that two smaller mirrors make the space look larger than one large mirror. The breathing room - wall space - between the mirrors makes the space look less crowded & more open.