If you want something done right, you gotta do it yourself.
I have noticed though that the large brand name plumbers are the most expensive. I think it's because they're mandated to upsell on any call. I hired one for $100 to replace some shower fixtures. But he spent 2 hours both figuring out what else he could do, and writing it all up and putting it in their database.
On that list of things was replacing the water pressure regulator. For $1500. It's a $300 part, and it screws on and off. Or you could buy a $100 restoration kit instead.
I was also recently quoted $1100 to replace two toilets. Not including the toilets. Looking online it should take 1-2 hours per toilet for an experienced plumber, and around $50-100 to dispose of each. So that's, at best, $200-$250 per hour. My hourly earnings after taxes are about $50. So I both learned how to, and replaced, the toilets in about 4 hours.