I would educate my tenants how to keep it from happening again and instruct them how to clear the drain. 

Just search for that term, get plugged into local real estate groups in your area, and seek out training or an instructor on that subject.  

These resources provide you with step-by-step instructions and tested strategies that have worked for others.

@David Beard is correct I believe based on this Forbes article and my reading of the code and instructions. 

I personally would not trust or want to do business with someone that didn't respect my "off limits" instructions.  

Immediately after closing, you or your property manager should have contacted the tenants and given them new contact number and rent payment instructions. 

If so, I could probably instruct the tenants to print out the relevant documents, fill out the paper work, scan the files, and then email me their completed forms.

I remember a time back the folks at Bigger Pockets were promoting Josh Cantwell, Appearantly the guy has salesmanship but look up the details of what he offers and you will find he wants the best deals, a sure profit and at minimum 16% on his money, plus he gets you to do all of the leg work and contruction but he gets to select the deals and control all of the money. heheheh When Josh was just a young lad he was told that, "there is a sucker born every minute" then instructed to go out into the world and find them.

I signed my closing docs Thursday and instructed the mobile notary to pick up flowers and take them to her hospital room when she is supposed to sign Friday(next day) BAD NEWS!

Hi Heather, I just completed their coaching program (virtually due to COVID), and I found the instructors Mark and Ron genuinely love to teach real estate and give you a lot of course information as well to review besides the classroom instruction.