While the IRS does not define a specific timeframe, I hear owning a property less than a year is a red flag.  

. :) No doubt it will get flagged soon...What we're looking for is:A fully unreliable person.

Interesting side note, if you research any properties that have expired tax certificates, where the lien holder did not apply for the tax deed within 7 years, this is a HUGE red flag that the property is not worth it. 

The background/credit check is basically the last report, to make sure that everything checks out and that there are no red flags. 

He also warned that with too many claims insurance carriers will drop you or you end up with a high risk policy and spend an insane amount on insurance.

Here are the red flags to stay away from according to the Fair Housing Act: there are specific reasons that a landlord is not allowed to reject an applicant.

First red flag of his PITA-ness:current landlord offered renewal on his two bedroom apartment at a $300/month aka 25% increase.

If they do submit an application, it's awful, riddled with red flags.  

That would be a red flag to me. 

Insurance for example, deductables and carriers will make that fee lower or higher.