My e-mail address is on my profile.

If your lease doesn't specifically address this, I recommend a two-step approach. 

I used to advertise the property before the move out but then everyone wants to see it then, and I don't want to show the property while it's still occupied, the old tenants don't really need the added chaos of having strangers visiting, and if I found something major after the move out that require more time to address, I have to get into a mad rush to get it ready. 

Please note that specific information such as the property address and names of those directly or indirectly involved in this particular real estate transaction were intentionally omitted to maintain confidentiality given delicate subject matter of/affecting health, life and safety.IntroductionHaving provided carbon monoxide (CO) testing of gas utilization equipment for well over ten years during the 1980's and 1990's in addition to having learned about the production, mitigation, prevention, testing, and harmful effects of elevated levels of carbon monoxide due to incomplete combustion of natural gas utilization equipment from a recognized leader/foremost authority on carbon monoxide testing in the industry by the name of Jim Davis—senior carbon monoxide/combustion trainer and consultant for the National Comfort Institute (NCI), who began traveling the country during the 80's and 90's conducting carbon monoxide training seminars for building and HVAC contractors, building inspectors, utility companies and virtually anyone interested in learning about carbon monoxide testing and proven methods to mitigate and prevent gas utilization equipment from producing elevated levels of carbon monoxide in flue gas known to cause CO poisoning—has without a doubt proven invaluable in heightening my awareness of conditions conducive to/indicative of incomplete combustion known to result in elevated/unsafe levels of CO in flue gas.

A) most MLS's will only allow an address to have one active listing at a time, so you cannot put it up on MLS. 

Use Excel's Conditional Formatting to highlight the "Owner Address" field when there are duplicates.

You can hand write letters and leave them on the door, knock the door and talk to the owner, skip trace the address and call and email the owner, Send letters in the mail, use something like Deal Machine(though it costs a little bit to use).

@Tracey Solomon you may want to address the late rent situation first.

I have traveled all over the world, everywhere there is pro's and there is con's, every region and climate has it's own unique issues to address, with that MN is no different.

Free way is to look up by address on the county website.