AirBnB - Is an LLC always necessary?

[Ryan Schickerling]

I just purchased a 2nd home in Port Angeles, Washington using a vacation home loan with 10% down. I intend to vacation there occasionally, and the remainder of the year rent it out on AirBnB/VRBO. I have done some superficial research about tax laws in the state of Washington and came across an additional tax paid for STR, and that a LLC is required to file these taxes with the state.

I am requesting some advice with best steps forward. My preference would be to not create an LLC at this time.