I spend hours every day looking for that information in google and I couldn' find anything rock-solid (pun unintended :p) that I could use in my negotiation.Does anyone know where I could find that information ?

It is more about the hours documented doing RE related work vs a W2 job.You can Google the requirements to read the specifics.

A nice tip is to go into Google alerts and type in words such as "{city/town} approves".

Start looking at housing in those cities (i used zillow) look at best and worst areas (google) Look at population of renters (google) Look what jobs, companies  are in the area. 

@Hilary GravesA quick google search pretty much consistently shows that NOI starts with Gross Operating Income that includes all revenues generated from the operation of the property i.e. rents, pet fees, vending machines, covered parking privileges, laundry revenues, etc.You mention standards :-) which may be a keyword here.

I Googled screening companies, and there are tons of them, but I have yet to find one that pulls the criminal and credit check separately.  

The base education advisor might know the answer too.I'm not the the DMV area, but maybe you can set up some keyword alerts here in the forums, to help you make local connections.  

If you just pick the first one in the phone book or a Google search, or based on the recommendation of some stranger on the interwebs, then you're likely to have a bad experience and see no value.

You can also just Google 100% LTV HELOC "Your Town/City" and see what pops up. 

With that said, below are some tips on how to find a local CPA.1) Attend a Local REIA / Real Estate meetup and see who other investors are using as a CPA2) Network with other investors from your City/State that you find on bigger pockets and see who they use as a CPA3) Look for CPA's with good google/yelp reviews where 'real estate' is mentioned in the review.