Knock on wood its still a great cash flowing property now that both sides are being rented! 

It's all online marketing no agent will knock the doors and  find the tenant!

I add $100 to the rent and if it's paid on time i knock off $100. so if the rent is $1000 and is do on the 5th of the month it's $1100 if they pay before the 5th it's $1000. most people love a discount. that way I don't have to due late fees and send notices out.

After the agent pulls those comps provide them to the bank, if the bank will still not appraise the home to knock PMI off ask them about re-financing through them.

When I arrived I knocked on the door as I always do.

Some knock and try to gain access/talk to the person being foreclosed on.

You could also just knock on the door, its Clarkston not Detroit so it should be pretty safe and this may actually produce the best results, people trust people that they can talk to face to face. 

In some cases I would almost think knock down and rebuilding would be a safer option with these properties. 

You can always go knock on the owners door people will be easier to convince in person or see what their intentions are.

Then call, then knock when possible.You can learn more about how to improve direct response marketing from Dan Kennedy and others.