I am planning on hopefully going back to school for occupational therapy soon but I am also interested in real estate.

it will be interesting to see how popular 'therapy' animals become, perhaps as popular as 'medical' mari-J already is here in CA?

At the same time, I really like @Brent Coombs statement... walking away is fine if it doesn't work.You shouldn't massage your numbers to make a deal that doesn't exist.If you are comfortable that $135K in repairs is what it is going to take, then use that number!

It could be pressure therapy, head support for those with narcolepsy, one of them could sense low blood sugar in diabetics and the other could sense seizures, there's a number of things. 

The terms service animal, assistance animal, emotional support animal, therapy animal, companion animal and/or comfort animal are often cited.

Your SFHome or apartment isn't zoned for business,, if they have anyone coming to residence for that purpose,, hair cutting, tattoos, tax work,massage parlor, drugs, or daycare,,,,,, its gonna be a issue..  

but then her partner said in an anxious whisper that was clearly audible on the phone, "say that they are therapy dogs!"

Having Pet policies instead of Animal policies in this age of ESAs and comfort/therapy animals. 

Walk in bathtubs AZ has water and air jets which provide proper massage and reduce stress.

They will typically wear specific harnesses which clearly state they are service animals when out in public.A support dog/therapy dog/emotional support animal is a companion animal that provides therapeutic benefits to a person with a medically diagnosed disability.