Therefore, those with a criminal history are at a higher risk of committing crime than a potential tenant that has a clean history.

Clean it up2.

The dirty tenant should have wording in the lease about keeping the unit clean and should also be billed for professional extermination.

Iit's a double wide 2bdr, 2bth, New roof new carpet. 

Closed on Monday afternoon, so took the day off to remove the carpet. 

Other than clean the place up I really don't do any "fixing".  

I find it's good to keep the power on for the refrigerator; otherwise I'd have to clean it again prior to another tenant moving in.And I like to keep at least one light on when a unit is empty to give the impression that it isn't (empty).  

Are you including cleaning of common area, repairs, pest control, and landscaping under maintenance?

You will have to clean that up yourself.

I have application with clean background checks and credit score of around 680Income to rent ratio is 2.5.I have asked for a consigner.However I am wondering if There are any other options worth pursuing to mitigate the risk - such as ask for 3 months rent as deposit instead of one month ?