I was also considering doing an Airbnb in Portland or Vancouver, WA. I found out that Portland and I believe Vancouver as well regulates the industry so that a permanent resident has to be in the home for majority if not 12 months of the year. Portland is not too keen on short-term rentals if someone isn't living on the property 12 months of the year. I understand that the city is cracking down on that. We considered option of buying a rental home with room to add an accessory dwelling unit (ADU) and use that as an Airbnb. In Washington the homeowner must be in the main dwelling 12 months of year to have an ADU (which killed the idea for us) and in Portland they do allow a non-homeowner (renter) in the main home to legally do ADU and Airbnb. We considered hiring an Airbnb management company but they have fees as well plus the hotel tax. Seems like it's a wonderful idea if you can do it yourself and/or live on the property.
We ended up buying a home to in Ventura, California near the beach where they allow short-term rentals. But in that neck of the woods I wasn't able to find an Airbnb manager (yet). So we decided we're listing with a vacation rental company for at least one week and possibly monthly vacation or corporate short-term rental. If it works out, we'll make some decent income from that and intend on building a second unit on the property for short-term rental as well.
I have two other long-term rentals in Portland and California and prepping the home in Ventura fir short term rental has been a new challenge and another perspective in appealing to the renter. It's like you need to create a "resort"/ vacation home and have to look at it through those eyes. It seems like good reviews and repeat customers are the life blood of a vacation rental.
Good luck with yours. Let us know how it goes! And if anyone knows of an Airbnb manager in the Ventura, California area please let me know! Thanks!!