I am in the camp that anyone can be found rather easily but it's a choice of your comfort level and what your desired outcome is.  

Your understanding of the capital gains calculation appears mostly correct, but a few details could affect the final outcome.

What was the outcome?

Consider the Costs and Benefits: Legal action can be costly and time-consuming, so it’s important to weigh the potential outcomes against the costs involved.

What was the outcome?

I should have asked what didn't go according to plan and how they handled it, and what the ultimate outcome was since the brief summary of that deal just says they sold at a profit.4.

What was the outcome?

What was the outcome?

What was the outcome?

I would decline reiterating cancellation policy and advise guest to cancel or contact Airbnb support if they believe they are entitled to a larger refund.If anybody else has similar experience, I'd love to hear the outcome and any advise!