Don't feel you need to bend over backwards to accommodate these applicants.  

As a new landlord it is common to try and go the extra mile to be accommodating to tenants. 

Landlords really need to completely understand their right to say no to "reasonable accommodations," and any applicant who happens to belong to a protected class - just because someone's in a protected class doesn't mean I have to allow them if they also smoke and I don't allow smoking, or because they have an emotional support dog that's a pit bull, etc. 

When people make unreasonable or petty requests, I'm not going to be very accommodating. 

There are very few protected classes and they don't include "people who smell like smoke," "people who don't completely fill out the application, even after I tell them it's required," "people with pit bulls for emotional support animals" (hint - emotional support animals require you to approve a "reasonable" accommodation - which means asking you to break a rule of yours - but it has to be reasonable.Knowing the rights of landlords as well as tenants. 

An expansion beyond the physical dimensions of the existing accessory structure shall be limited to accommodating ingress and egress.

Exemptions include "Housing accommodations in which the tenant shares bathroom or kitchen facilities with the owner who maintains their principal residence at the residential real property.(5) Single-family owner-occupied residences, including a residence in which the owner-occupant rents or leases no more than two units or bedrooms, including, but not limited to, an accessory dwelling unit or a junior accessory dwelling unit."

And, we actually never had anyone want a reasonable accommodation to have a companion animal.  

It's my opinion, that now they are trying to milk you, and because you have been so accommodating, they will be a pain in your rear if you keep them.  

The trick is to stay calm and diplomatic and friendly, but say "I can see that you're not happy, but I'm not able to accommodate you.