In my opinion, this is much more effective than texting, which often feels like a constant game of cat and mouse with phone carriers.

But, the situation you spelled out raises a lot of red flags. 

Zillow will also offer climate history of a property alongside custom tailored insurance policies and carriers. 

What red flags should I be aware of?

Quote from @JD Martin: I never got to see them, but I have no doubt I was flagged more than most.

A sure sign of a dead beat customer is them NOT wanting to pay the deposit , it is a big red flag that they dont have the operating capitol . 

We have opted for a hybrid approach - LPs who want to pay for access can get an exclusive network, privately discuss operators, privately review and see other LP reviews of sponsors, and discuss "red flag" sponsors. 

That's going to depend on the specific language in each carrier's policy and homesharing endorsement though. 

If you bother too many hosts, you may get flagged as spam or get reported on Airbnb.

That's a red flag that your new PM doesn't know what they are doing.