I am telling them all the standard requirements before even seeing the unit, 3x rent, good credit, no criminal record and no evictions.Thanks 

Unless they're wrecking the property or engaging in criminal activity, a long-term tenant can be a blessing.

Also, if anything ever happens, like say a fire starts in the basement duplex and travels up the stairwell you illegally built killing everyone inside, then you are not only talking financial liability but criminal liability as well.

I use the SmartMove application through Transunion and they both have good credit, no criminal, or eviction history. 

We do a credit, criminal, eviction history as well as verify employment by either current paystub's and we ask for two months back.

Courses #5 – 8 may be included in your postsecondary educationExperience Requirements – 20 transactions The Division calculates the transactions to ensure the applicant meets a total of twenty by using the following formulas: • Listing agent in the sale of property owned by another = ½ transaction • Selling agent in the sale of property owned by another = ½ transaction • Listing agent in the lease of commercial or industrial real estate owned by another for a term of at least one year = ½ transaction • Procuring agent in the lease of commercial or industrial real estate owned by another for a term of at least one year = ½ transaction • Listing and /or procuring agent in the lease of four residential real estate properties owned by another for a term of at least one-year = 1 transactionThere are also requirements about not having a criminal record.http://www.com.ohio.gov/documents/real_Requirement...You can probably get into investing sooner than you can accomplish all of that.  

the biggest issues are that the available tenant base drops dramatically around October and doesn't pick up again till the end of the school year.People are no different than animals in that regard.They want to be settled and hunkered down in a property before the school year and/or bad weather starts.Quality tenants with good financial backgrounds don't want to move their families in the middle of an icy,snowy winter for obvious reasons,and good college students have already started school in August.Many of the few available tenants will have questionable backgrounds like recent job loss,previous eviction,bad credit,difficult income verification and don't make 3 times the rent,criminal records,etc.   

They do national eviction searches as part of their rental background check, and they do a criminal and credit check, too.

You are still allowed to reject that unauthorized roommate if you find criminal or other negative findings from the screening.If you decide to approve the new tenant, just draw up a new lease for a 1 year term (or your choice) with the new rent and make sure all roommates are included on the lease. easier that doing addendums for rent and roommates etc. and you get them to commit to a new 12 month lease so you dont risk move-outs in the middle of winter.

For myself I believe that it is criminal for a tenant to not pay rent owed.