I train with an Olympic Weightlifting Coach.
Probably has helped me progress further than I ever had. On top of that a good coach will essentially force you to compete. The element of competition will help drive you to new levels as well. Having a coach structure your workouts and watch your form takes all the guess work out and you can focus on going full bore in terms of intensity.
The reputation of a coach varies. It is likely a Competitive Olympic Weightlifting Coach will be good, since the sport is fairly fringe and only people who love the sport and have done the sport would do it.
6 days a week during the Summer. Once a week during University
During summer I train at the training hall, so my coach is there all the time. During University, I train at the school gym and go to the training hall on the weekend. He has competition training cycles set up, so he gives it to me and I just follow the workouts. I can contact my coach if I have any concerns
I have not paid anything, and have 2 local meets under my belt.
Depending on the situation, a coach can be very helpful. Strength Sports is one such situation.
I would rank prepping for a BB Show high up on the list as well.