@Nathan G. Thank you.
I am aware that while the medical condition of the owner doesn't need to be disclosed, a letter would have to be procured from the owner's licensed therapist or practioner for an ESA. It will be interesting to see how this plays out. Apparently owner had a seizure so think an ESA would be a good idea.
My initial research spoke to the regularity of seizures to qualify with proven medical records which I know I won't have access to.
Another way out would have been the number of units owned plus the owner lives at the residence albeit a separate entrance (basement can be accessed through main house but they use 2 other entrances into their area). However, being a Realtor this disqualifies me.
Then there is the hardship for Landlord and undue burden with other occupants so as of now this seems the only argument I see. So plan to schedule a meeting and get feedback.
I posed the question for discussion and hopefully help others that may be facing the same thing.