Was A exempt from some or all of the requirements of Dodd-Frank, or does B have defenses if push comes to shove?  

People don't read for rent signs if they believe they have already communicated with the owner/ manager.

I'd echo what was communicated. 

This IRS publication 527 says it pretty straightforward "The section 179 deduction is a means of recovering part or all of the cost of certain qualifying property in the year you place the property in service.

What do I communicate to the tenant?

On a positive note, you can cash out refinance and pay off some or all of this credit with the funds at closing and that debt won't be used against you. 

Looking forward to any comments and communication.

Above all, I think communication is the most important--if you have an open dialogue and address her concerns, I imagine you'll make progress :) Good luck! 

It's a bit of investigative work, because most likely you will find that most or all of these properties of this size will be held by an LLC or a corporation -- from there, you can proceed on trying to find names behind those companies by searching in the Secretary of State filings in the state of which that company was formed.Once you have your list, start calling or mailing.If you don't want to spend the time doing this on your own, there are subscription based services out there that aggregate this data for you, but of course for a price.

I have a couple section 8 properties in SC and I love the program.My area pays 110% of market rents.Section 8 inspects my properties at least once a year to make sure tenants are taking care of property and I find out if anything needs to be repaired.The Government direct deposits most or all of the rent into my account.Tenants in my experience take care of the property so that they don't loose the free government money.