How much would you charge

Im assuming you do quality work(first you get good,then you get fast)
Regardless of how long it takes, your time has value.
Hourly x 1/2 the nearest shop rate isnt out of the question.
My workshop rate is 1/2 of the city rate.Nissan in winnipeg is $139.95 per hour.
Worried about working too fast? Then take your time.