Hire a certified industrial hygienist to perform an air quality test (recommend this over a test kit you can buy at a store since those typically do not hold up in court.

hey guys, I wanted to see if someone who has been around the block  can offer some insight.I have been house hacking my rental for the past 4 years but have recently moved out and am legitimizing it working with a prop manager and such.one thing that has crossed my mind is when I switch my house insurance from owner occupied to rental, they will be performing an inspection and im a little bit anxious of my roof.My shingles and ply boards were changed not too long ago however the joists are warped due to the house being a 1920s.

Some states the duty to be performed could be as high as not protecting from injury, it could be, now that would be rare, most likely would be not warning of a hazard which caused injury.  

Not sure of your current terms, but rates are pretty low right now.Honestly, it seems from the post that the PM is performing as required.  

Here you are evasive to submit past performance of the properties you sell.  

I don't know about MD, but in Georgia you have a unilateral 7 day extension on RE contracts (either party can extend for any reason). 

The bedroom ceiling drywall, one wall, and the bedroom carpet all had to be replaced.To be fair, the tenant had no access to the downstairs bedroom, but his negligence to let me know of the water leak in the upstairs kitchen led to extensive water damage.The insurance company said they estimated the damage to be $5,489.

The biggest issue is that tenants do not clean the filters as often as they should which can result in a more extensive and costly cleaning being necessary. 

I know this form of marketing is effective, but I'm guessing I probably didn't perform it correctly which cost me a lot of time and some money.

The house needs extensive work I mean extensive.