In the meantime, we couldn't start demo because it would have jeopardized the buyer's ability to close loan.

Up to the date he had only completed partial demo.

The  LN product seems very involved to get started (a rep has to contact me for a demo etc?) 

@Steve Enochs I've tried ALL of them and actually just demoed Kigo which I really like.

The second-floor apartment is a four-bedroom one bath that requires a full demo.

Not sure if it is their responsibility or yours (I always pull city info on any house I plan to purchase) to discover or divulge the home being slated for demo... but it can't hurt to open dialogue with the seller and their team.

Also if the smell you describe is into the sheetrock, then it might be worth it to demo it all as well.Keep in mind, electricians almost always "ask" for the drywall to be removed.

That's your primary rental demo over there. 20 somethings, not really families.

Well after demoing half the sheet rock,and pulling the carpet, most of the smell was gone.

I only intend to Demo and wait until i own the deed however will wait if necessary.