Might be something to also look into.Bob E. is totally on point with many of his assertions.

No one but the owner should assert control over a property.My $0.02 ...

I also agree with your assertion that a "whiff of complexity" does not automatically require engaging a lawyer.  

What are the main points I should make to be assertive and get the position?

Hey Folks, I have deals, deals, and more deals coming at me, I'm finding through various assertive efforts!.....

I would assert that having to hire a lawyer to get coverage would be the exception rather than the rule when it comes to liability policies.

Regarding the first assertion, the defendants argued, and the court in Reifert held, that where a seller with "market power" in a particular product or service market requires purchasers to also purchase a second, separate second product or service (the "tied" product), that requirement is unlawfully anticompetitive only if there is actual competition in the tied product market.

In this experience, they did not hesitate to hang me out to dry by not providing me with any information about the nature of the issue, by pulling the reservation (and payment) after her arrival, and by asserting that I had to make her leave on my own.  

I’m guessing that’s your 1/3 share and even then I’m guessing the manager can make an assertion that some cleaning was needed.

The worst they can do is assert the matter is not covered.