My nephew makes a very good living as the guy that fixes flaky outlets. Word of mouth only. He will get a call to do one - usually the microwave outlet and wind up doing the whole house once the home owner sees the potential for fire.
In the end though, we calculated that the method which I described that I used would achieve the same results without raising the cost except in construction time. I trained several of my brother's brighter workers in that method.
We'd like to think that at least some of them are doing exactly the job your nephew does.