Dig up the yard, let me guess and lead inspector posted that LOL, Total BS.

Open to any optionsIssue 2: I'm a building inspector and a residential property landlord.

Make sure you have a good home inspector.

We tried to get an extension so that we could get an inspector to scope the pipes but the seller wouldn't grant that extension.

I will use my knowledge in the home inspection field, owning and operating my home inspection business, the relationships i will make during that time, my experience in being a landlord and my knowledge as an licensed electrician and home inspector to help convince my investors that i am serious and have the skin in the game to get deals done.

The mold inspector & remediation  company should provide you with a certificate of clearance.  

This can include opening some walls here and there so the inspector can check if everything is built to code, then you repair or tear down depending on what they find. 

The inspector came in and said - you now have to bring all these window casings up to code.  

Ask them how they work their draws, by inspector or by an app, ask what their draw fees are. 

Also recommend finding an independent septic inspector to inspect the system.