(***Disclaimer*** The following comments are based on my experience in South Carolina and not intended to offend or degrade the Home Inspection Industry or those that are in anyway associated with the industry)
If you were in my neck of the woods, a home inspection will basically suggest that everything that is not currently in compliance to the version of code in use, be upgraded to do so. There is no set rule for this, but some reports I have seen will scare you to death if you did not know better. In SC, there is a state mandated form that is used. This said, I would suggest you, as an electrician go look through and make the necessary repairs that you see as being required. Then have the inspector come through. I have seen HI's harp on trivial things while missing major problems. An example was catching a bad GFI receptacle while missing the floors cupping in one corner of a room (Master shower was leaking) HI's seem to be trained to catch the obvious. Most of the ones I have dealt with had only been licensed as HI with no background in construction.
The usual culprits I have seen cited are open junction boxes, flying splices, grounded receptacles in a non-grounded system.
As for missing something, if you pay attention, and treat this as a game to find everything wrong, I doubt you will miss much. I know the HI's here are only liable for the amount of money you pay them. So if they miss something, they give a refund and are on their merry way.
You might inquire with your insurance agent that you are covered to give electrical inspections.
I know I get ask every year if by mine if I am doing Home Inspections (as I am also a licenced builder, I have the right to do them. If I was a licensed architect, I could do them...why the state allows this, I will never understand)
c2500