Maybe it was out of your control, but one thing weird to me, is you came here for expert advise, much was given, but from what I can see none taken/implemented???

I do have a few strategies that I have implemented to still grow door-count quickly, utilize multi-family style investing with single family homes, and make sure you are mitigating risk as much as possible. 

Implementing the proper legal and financial structures can help shield your personal wealth, reduce your exposure to litigation, and limit access for potential creditors.

Are there best practices or disclaimers I can implement to reduce my legal exposure here?

From my research so far, WA state law prevents cities from setting occupancy limits on single family homes.

When starting on Airbnb, it will be impossible to implement this rule to verify age because it's against their new policy to discriminate based on age.

In the inspection report he clearly mentioned that all the vent and moisture preventions are ok.  

Some of the perks as a DIY landlord self-managing is that you have control and can implement unique flexibility and hands-off systems into your Lease.PM companies have internal policies and rules/regs.

It's essential to address this matter quickly to prevent further complications.Reach out to the tenant directly Discuss their current situation Explore possible solutions togetherYou may also need to consider looking into legal assistance and initiating the eviction process if necessary. 

Success hinges on one's ability to craft exceptional guest experiences, market properties, and implement systems for cleanliness and customer service.Despite the skepticism surrounding "course gurus," I would suggest considering a reputable course, particularly if pursuing the arbitrage route.