Cost of enough tools to work effectively has and is getting even more expensive with time. In the mechanic trade to me is a downside.

Also in far too many cases the industry itself has issues. A local GM dealers mechanics went on strike. The law here in this Canadian province was they should get a certain percentage of the hourly rate.

They were not and this had to be pushed by the employees. I remember the case well as it occurred at the time that ownership of a GM franchise was considered almost a license to steal.

Anyways the modern car is complex enough that a specialty shop to me is a way to go for many reasons. Number one is you have a far better control over your parts costs. So you absorb far better margins on your parts inventory. Allowing you to charge a lower hourly rate. You should still come out far ahead financially than the shop trying to do everything.