Earlier quoted context omitted.
That maintenance has to happen one way or another, hiring someone to do it can add quite a multiplier to the price. For example, I was recently looking at water heaters and called 4 different plumbers to get a quote. All of them came in around $5,000 for the job. The water heater they quoted costs $1,000 retail at Lowes. If you know what you are doing it isn't even difficult to install. That said a layperson probably…
> If you know what you are doing it isn't even difficult to install. How much time does it take to acquire & refresh the skills and code knowledge, and how many water heaters can you amortize that over during your life?
The building code stuff is more of a bugbear.