There are things like airdna but they've not become widely accepted in the industry. 

Two days before I was suppose to leave to Tampa, I got a deal accepted on a duplex in Phoenix.

Once your friend accepted rent from them, he essentially accepted their tenancy.

After they assured me this would not impact my credit, I accepted the modification and began the 3-month process to get out of forbearance. 

I'm letting the fear of 'what if they accept' hold me back, and I feel like I need to solve the problem of housing BEFORE I buy. 

I also only accept cert check though so it's not a concern.  

If they say a particular change is acceptable, ask for it in writing.

(if you are even accepting any new clients at all, I know everyone is busy.)  

Dealing with the fallout is always worse.I have no idea about this situation as I wasn't there so not advising you to accept or not accept. 

Key things to look for:(1) Experience - however much you deem acceptable(2) References - contact the last 3 customers they did similar work for(3) Compliance - be sure they're following local rules in regards to permitting/inspections (4) Specialty - a lot of guys say they do it all.