If you increase your finances through real estate without changing your personal behavior you will only amplify your problems.Work on yourself first, there are plenty of books and online resources.

All of them have criminal -free background. 

You can't control your guest's behavior, yet you'll be held responsible when next door neighbor Karen reports them for the slightest offense.

I would set your floor at 600.But, a better solution is to look at the whole person (credit score, criminal history, Landlord references, length of employment, and other factors) to determine a level of risk, then act to deny them or find a way to mitigate the risk.Some managers/landlords - including myself - will rent to anyone . . . as long as they are willing to pay the price to mitigate the risk. :)

Make it seem you're concerned about the well being of the tenant(s) otherwise they may not take it to seriously.Some PD's will not get involved in civil issues if you just ask them to go with you to enter unless there is fear of something criminal having happened, or there is a belief you would be in danger by entering.

The excuse that their information got stolen and then the criminal just so happened to have the correct apartments.com login credentials and then made a payment on your behalf flies like a lead weight. 

What is the difference between a law, a statute, a code, a province or municipality, civil law, criminal , admiralty or maritime, what is feudalism, serfdom, what is a subject, how does a subject become a lord, what is private property if it is a subject to the state i.e., property tax.

It may also be a criminal history that shows a possiblility of going to jail.  

(G)executive departments and agencies in connection with the issuance of government-sponsored individually-billed travel charge cards.(4)In response to a request by the head of a State or local child support enforcement agency (or a State or local government official authorized by the head of such an agency), if the person making the request certifies to the consumer reporting agency that—(A)the consumer report is needed for the purpose of establishing an individual’s capacity to make child support payments, determining the appropriate level of such payments, or enforcing a child support order, award, agreement, or judgment;(B)the parentage of the consumer for the child to which the obligation relates has been established or acknowledged by the consumer in accordance with State laws under which the obligation arises (if required by those laws); and(C)the consumer report will be kept confidential, will be used solely for a purpose described in subparagraph (A), and will not be used in connection with any other civil, administrative, or criminal proceeding, or for any other purpose.(5)To an agency administering a State plan under section 654 of title 42 for use to set an initial or modified child support award.(6)To the Federal Deposit Insurance Corporation or the National Credit Union Administration as part of its preparation for its appointment or as part of its exercise of powers, as conservator, receiver, or liquidating agent for an insured depository institution or insured credit union under the Federal Deposit Insurance Act [12 U.S.C. 1811 et seq.] or the Federal Credit Union Act [12 U.S.C. 1751 et seq.], or other applicable Federal or State law, or in connection with the resolution or liquidation of a failed or failing insured depository institution or insured credit union, as applicable.

Hmmm, I didn't realize State laws like "foreclosure avoidance is a criminal act", excise tax on all property sales, the tax costs from the tunnel in Seattle, funding the ferry system, increasing gas taxes to accommodate the heavy traffic in Seattle etc don't affect Wenatchee, Spokane and the rest of the eastside.