I'm not convinced of the "being inspected by someone qualified" part, there are schools now to just become an inspector, not knowing anything about actually doing the work. Opinions differed from inspector to inspector when doing my work. One would say "why did he approve that?" or "ok, not sure why he had you do it that way.." One inspector was not more than 20 years old, and didn't seem like he knew very much.
Most cities and counties are going by the international building code now, so most things are similar builds now. (electric, hvac, plumb)
It is a challenge to get through the process sometimes.