Look for CPAs who stay abreast of evolving tax codes related to real estate and possess a comprehensive understanding of deductions, credits, and depreciation strategies unique to the industry. 

Anyone have any good referrals for any of these sources that are geared toward or accommodate investors?

So it's not really a change in behavior, but rather a change in accommodations. 

FHA rules require that a landlord allow an ESA if it is a reasonable accommodation.

It most likely won't help them in this case but let's face it - they're not big on resolving their own problems especially when you're accommodating them.The longer you allow them to live rent-free with no solution in place, the longer they will do just that.

Also very good for many of the same reasons, but not as comprehensive. 

Instead, we provide comprehensive investor services—from onboarding and training through management—working with trusted third-party partners.

Pretty good book on the subject:https://www.amazon.com/Subsidized-Comprehensive-Government-F...

Thank you.While I am lending exact direction, you will need to dig a bit more on the statutes, to gain full comprehension of the statutes in reference your question.     

City regulations require some kind of license for most property that is uninhabited or otherwise out of active use for three months or longer.Of the funds’ rental licenses, about 40 have lapsed and have not been renewed, but that doesn’t appear to be stopping Mendenhall from accommodating rent-paying tenants at at least some of those properties.The Inquirer visited eight properties with lapsed licenses in West and North Philadelphia.