Next time, also get estoppels with the seller and tenant signatures so you're all on the same page about when rents are due, how much they are, and how much security deposits are owed.Take it as bitter medicine.  

Got hold of the tenant, and his reply: "I was going to call because I had water coming out of the medicine cabinet".

People can take medicinal marijuana by other means than smoking.

Could just be seasonal allergies however.

Tenants have rights, and for those with severe allergies who decide to rent in a pet-free building because of those allergies, those rights include the right to live in space where their allergies are not triggered.

Asheville has also become anti-STR for the main reason that investors (like you and me) are buying up property to rent out to tourists and taking reasonably priced inventory away from locals or driving up rents with limited supply. 

The anti-landlord hate there is so great that I would be afraid to deny anyone for any reason.

@Joseph Cacciapaglia: None of my properties are in California or Washington anymore because of the problems discussed in other threads about city councils being anti-landlord,etc as spelled out in HELP US!

Request  upfront a fee to clean air ducts of fur, deep cleaning of carpets and floors, etc so that you house returns to an animal free home that can again be rented to those with allergies to pets upon their leaving.

Not every buyer will want one but some with allergies or needing cleaner air it will be a selling feature.