I personally think if you find 20 problems in one area, that a licensed person should come and evaluate it. That many problems is a problem, and someone before did not know what they were doing. I though our job was to find problems, and not spend hours to trace every one down. I am not going to name all 20 issues. If the electrician, who specializes in that field, can not see the issues, then they need a different job. I can handle adding several, not multiple. If the whole house is riddled with problems. It should be reviewed. I personally inspected a home once, and I found five outles that were correct. That’s it. Everything else including the main panel were fubar. I think in that case every light fixture should be pulled down. If they can’t wire an outlet right, what else is there?