Earlier quoted context omitted.
Ask a plumber to show you their crawlsuit and describe the last month or so of their work and you being to appreciate their rates.
I talked to 3 plumbers recently when I bought a partially built house. First guy was a "commercial" plumber working on new builds only. Second guy was a "home renovation" plumber. Both these 2 plumbers won't go near a clogged toilet. Third guy specialized on clogged pipes and home emergency repair.
And knows anyone calling him is likely over a barrel and willing to pay big money to make the problem go away. Odd hours, but a respectable hourly rate (assuming he has some skin in the game vis-a-vis owning the business).