Thank you in advance for any and all feedback regarding this strategy, including any legality issues that might prevent us from following through! 

This brings up another question.. how do I prevent my DTI from going over 43% as I accumulate more units?

There's really nothing to prevent the realtor to come back over top of my offer and take the property for themselves if the seller agreed to such a reduction correct?

Preventive measures are best.

The places I have used foam are things like crawl spaces or the underside of porches to insulate and vapor seal to prevent pipes from freezing. 

What I recommend doing at larger multi family buildings on an ongoing basis is preventative quarterly treatments. 

It’s simply preventing me from getting that deal.

The first pillar is avoiding unnecessary and risky activities (don't drink and drive, insurance generally won’t cover your poor decisions) and take good care of your investments - these simple steps will help you prevent lawsuits before they even occur.

Tenant's need to do their part to prevent mold spores from taking hold.

@Brad Warshaw If it's a good HOA that knows what they are doing, the first step they are going to do as the HOA is to place a Lien on the property, This will prevent the owner from selling the property without them getting paid all back dues, attorney fees, late fees, Interest, and any other cost associated with them getting the past due fees collected.The next step is going to be for the HOA to foreclose on the property if they still don't get paid.