My issue is that in the opinion of the remediation contractor (who has a financial incentive to recommend as much remediation as possible) all that wouldn't reduce mold levels long term, due to the fact that it's a basement in Portland, and the levels on the report are extremely common in basements in the area where no water intrusion had happened.

No major issues.

I want to find a professional one to give me the advise how can I makeup this issue.....

If it is a safe area and its possible to pull out of the driveway that is the big issue.

That fee goes by many names but "Success" fee is quite common.

The two most common lease termination criteria is to move family into the unit extensive rehabs.  

For example, I'm assuming that I don't need to notify the tenant before we come in to the common areas for maintenance.2) As far as I can see, the previous landlord was not paying the tenants simple interest on their security deposit when they checked out.

Is it common for a house flipper to pay a buyer's closing costs?

HI BP,I've been thinking about what to ask from tenants in case of issues...besides a copy of their gov't ID (Drivers or passport), credit report stating full name, address and birthday, what else do you all typically ask for? 

City may have red flags on several issues.