I designed the bathroom reno myself last year. I started with a photo & just pasted real samples on to it. Here is the before/the plan/the result.
The vanity had to fit a spot so our contractor connected us to a cabinet factory dude (all Asians - all cash btw) who custom-made it. Painted wood doors, Ikea-like hdwe & mdf innards. Soft close etc. It is a dark room so it had to be white anyway. We chose the granite from a granite dude (more cash). The total for the vanity was $2200 including the mirror & the granite piece on the short wall.
This was just after the install but before the final adjustments on the drawers.
Ian