They then were sealed up until a crime scene unit went through it, then they sat until a private cleanup company removed all the chemicals and it was again inspected by the health department.

Also, as a wholesaler, I would assume you'd like to get your fee, which can only happen if the deal closes, which at this point, looks doubtful given the buyer is trying to do something they won't be able to do, and you are not ensuring the smooth closing of this transaction at all by educating the parties and moving this process forward.I'm not trying to be overly harsh, but you need to get back involved pronto and either right this ship, or cancel the contract and release the seller so they can move on with their lives.

I'm still fairly new to the RE game, so critique as harshly as needed!

Very smart and it seems to be working.I'd be happy to see them in person, since these generalizations may be too harsh versus the actual situation on the ground.

You will need to be on your toes at all timesYou will run into set backs (often)You will need to evict peopleYou will need to throw families onto the streetYou will make children homelessYou will have your house damaged You will need to hire a team of highly skilled people to be your eyes and ears on the groundYou will pay a premium for services provided on your real estate portfolioYou will be harshly judged by those outside of the industryYou will need to make decision based on the best interest of your business and not your feelingsWorks out great for some.

I hate to be harsh but What on earth do you mean you suspect this and that ?

I currently live in Philadelphia, PA working as a Chemical Engineer at a local petrochemical refinery.

This may sound kind of harsh but would it be a possibility? 

(sorry, not meant to offend).I know a lot of the comments, mine included, can seem harsh.  

The existing tenants were able to find a replacement tenant, such that the increase in rent isn't all that harsh on everybody.