An ‘exploit’ along somewhat similar lines works for having a cat (or dog) as a pet in Waahington State:

Tons of apartments or rented out rooms of houses will say that they do not allow cats.

Basically, if you can go to a therapist, counselor, paychologist and tell them hey I really love my cat, he/she cheers me up when I’m down, I’d definitely become depressed if he/she ever ran away or I had to part ways with him/her…

Now this cat is your registered emotional support animal.

This costs you nothing beyond the normal cost of visiting your mental health specialist.

By law, it doesn’t matter what a landlord’s stance on allowing cats (or dogs) is, if it is officially your emotional support animal, it can live with you, and the landlord is legally barred from charging you a pet deposit or monthly pet rent/fee.