Document EVERYTHING... every conversation, every contact, every document from the remediation company etc etc etc.Then I would send him a certified letter that states all necessary precautions, accommodations and solutions were done.

At that point, it's worth researching and finding a solution that better meets your needs. 

At that point, it's worth researching and finding a solution that better meets your needs.

Infinite Banking says the solution to the real problem in America is to solve one’s need for finance throughout one’s life.

If you need someone to chat with and come up with a solution, give me a shout.  

My area of focus is Information Technology/Information Security but I can usually help someone work through a problem when they are trying to leverage tech in building themselves a solution to a problem they are facing.Very best of luck to you

The solution I outlined above is a cheaper, faster and more likely to result in achieving the outcome sought by OP. 

They also offer customizable lease agreements.TenantCloud: This is a more holistic property management solution, but it also offers tenant screening and customizable lease agreement functionalities.Rocket Lawyer: For e-signing lease agreements, this tool is useful.

If you didn't run wiring to the ADU and that's why you're providing WiFi, the solution is to run wiring and ask the resident to get their own account. 

At that point, it's worth researching and finding a solution that better meets your needs.