And the service dogs are only included in a protected class as a reasonable accommodation for a disabled person - so the protected class is a disabled person.So, I don't see any problem with saying yes to one dog, or no to another dog, based on anything you want.  

Given the property is in demand, you do not need to keep a tenant who you do not trust and on whom you will need to routinely check.

schedule a routine inspection of the interior in the next month.

Sounds like she could lose her job and then they live off his disability and tell you they can no longer afford rent.Based on what you have provided it would be a NO.

Tenant A routinely complains about tenant B making noise, blocking the driveway, and having multiple people over, and when I recently brought it up with tenant B and asked them to keep it down and generally be more neighborly, as stated in the lease, they complained about tenant A harassing them and acting aggressively.  

As we bump along our landlording journeys, we acquire great material for a dramatic novel or a comedy routine.  

I just checked for NC and this is what I found:"For purposes of subsection (d), personal property shall be deemed abandoned if the landlord finds evidence that clearly shows the premises has been voluntarily vacated after the paid rental period has expired and the landlord has no notice of a disability that caused the vacancy.

There is no right to have more "disabled" people in a home than would otherwise be allowed. 

If a service dog puts a landlord in a financial hardship, though, the landlord can refuse the request for a "reasonable accommodation" for a disability. 

ok thanks.wondering if its legal to require a deposit for what could be construed as a device prescribed to cope with a disability..