At the Class B-/C property, we experience a higher level of incidents and-or disputes between the tenants, more occasions of requests for rent payment extensions (i.e.

I have nicely asked the PM on several occasions to be more proactive about updating me with the tenant when they fell behind on payments or when I did not receive my owner's draw on time.

I have on two recent occasions come across HOA CCR's that are so Draconian in nature, that if faithfully observed, completely block househacking as a strategy.

Lets just say he asked for my agent's fax number on several occasions.

This might have opened dialogue to let me know there was a high-risk dog there that charged the neighbor on multiple occasions.

Pre-foreclosure (especially pre divorce about to be bankrupt hoping to save somewhat of a credit rating just need to sell this thing) is where the real good deals pop up on occasion.

Most lenders will only grant extensions on 2 occasions (usually you don't get more than a total of a 6 months extension from maturity). 

@Mike HartzogI have had to deal with this on a number of occasions (sometimes feel like lender of death as I am up to like 8).You will need to see if probate has been opened.

I have also had various household appliances interfere with the signal on occasion.

Oh boy, I wish I was LESS qualified to give advice on this topic, but unfortunately I've dealt with shared sewer lines, unrecorded easements, etc. on at least 6 occasions (one of which I'm currently dealing with).