---------------------------------------------------Do you really, really, think that there would be a flat fee for such things, given the infinite variety of conditions a plumber or electrician could encounter?

Hello guys recent college dropout looking to get into rental properties I'm starting an electricians apprenticeship soon and I want to really know what I'm doing before I take the plunge

Why you may want seperate meters , I had a friend who came from out of state and lived in his RV next to my garage , he wanted to give me $25 a month for electric , I decided to have my electrician throw on a sub meter just to keep things fair .

I'd say over 75% of change orders I have gotten from him were things that inspectors said they were going to require us to do that were not in the scope, and really shouldn't have been required, but they have you at their mercy so we have to do it.A good GC should be able to estimate the costs that they will pay to the plumbers, electricians, flooring guys, HVAC guys etc. close enough that they should be able to give a solid number without having to bring back a half dozen guys to look at things and take measurements.If it is iffy give a best and worst case contingent on getting the specialist in there.

Capturing photos of plumbing, and exposed electrical the electrician was actively working on.I received a notice about a week later saying my insurance was being cancelled effective 2/1/2018.

Beware of wiring in the wall to be opened, you'll need an electrician to reroute it up and around the opening.

In this case, I don't need to ask an electrician to modify anything in my basement. 

The cost is difficult to answer as my father in law is a licensed electrician so it was very cheap to split electric services.

Sharing utilities with tenants is common Chicago as the housing stock is often 100 years old and often utilities are so intertwined, it would cost you a fortune to have an electrician come and sort it out(which I did have to do for one property I own...it was a 10K expense to the electrician).   

I have been doing construction work for several years and have been an Electrician for the last two years so if you needed a contractor to do a little work I may be available.