my mechanic felt the same way as you do .. he has his own unit now.. cost him enough to get it and to keep it going .. but he is always busy.. does 3 days at his place 3 days at someone elses then goes upto his own unit after that.. he works untill midnight or longer somedays to get stuff done for people, but they keep bringing cars to him so he must be doing something right.
i know he does not regret doing it