Re: "homeowner's know it all"
I contracted one job for a 1200sqft lower living center where both an electrical and plumbing permits were needed. It was a large community so there was no shortage of inspectors. But I got a chuckle that the electrical inspector, who did a thorough job with his inspection, doubled as the plumbing inspector. He didn't do anything other that to simply make sure the toilet flushed properly which did make since you would think.
Oh well.