If they're only willing to pay by check, it could be a red flag in my opinion. 

For example, I try to rent to families and try for longer durations with renters that will take care of the place and also might put down roots with kids in school etc.Check crime stats, schools, population trends, big job suppliers, colleges, hospitals.

Do you go to conferences, yes, but when I see their ads for their courses, books etc. to me that is a HUGE red flag.

Brown's assumption of this role is one of the root causes of her statement that it "could not be done in a few hours per week".

She would have money for Aug rent, if not red flags because what was she going to do if she stayed.Her leaving on the 20th means you have some time to go in and clean it up (probably not much to do as she was there for 4 months) and maybe get it rented by Aug 15.

There are facebook groups just for RAL Managers, so get in contact with some of the members and see if the person has any red flags.

But with all the red tape, why would you want to?

"High demand area" and "off market deal" are red flags for newbies!

Insurance red flags.  

This will give you insight into their financial health and stability.Look for any red flags, such as high debt levels or irregular financial practices.Understand Their Underwriting Process:Inquire about their underwriting criteria and process.