My dad works on yachts and boats, doesn?t do book or estimates anymore. Everything is hourly. One rusted bolt and it can take half a day to remove the threads.

Myself it takes me about 2x book rate if I don?t tinker with something else. But I do it for myself and OCD and what not.

For those questioning high prices of experienced techs: you are not paying for the labor, you are paying for the experience that will get it right and get you home safely.