I do bathrooms, one after the other.
A friend had a quote for 22 grand, and asked my advice.
I put the same bathroom together for her, for just over ten grand.
This was a total demolish and redesign, including the ceiling and electricals, and minor plumbing changes (flick mixers instead of twin taps)
I made 7 grand for two weeks work.
She was happy, and so was I. It's a tough gig, but I enjoy the results.