I don't want to be fielding phone calls all day, everyday like last time around.

You are calling with an opportunity for them to sell their house for a fair price.

I got a call from the Warren City hall and they reported pipes bursting and the whole driveway is flooded on initial reports.

I plan on mailing the letter certified and I wanted to know do landlords also call the tenant as a courtesy to let them know about the letter. 

+I've call some GC that do new construction homes to get an idea of the build cost.

Assets identified in this study include:Appliances: Dishwashers, refrigerators, and ice machinesInterior Finishes: ceiling fans, flooring and decorative wall treatmentsFurniture and Fixtures: shelving, counters, mirrors and cabinetsSpecialized Equipment: diagnostic machines and hydraulic liftsSecurity and Communication Systems: key card readers, telephone connections and security cameras30% of the total depreciable basis was classified as 15-year class life.

Do that before you spend any energy trying to kick him out.If he hasn't paid rent, you can call the police and have him escorted from the property. 

What would this be called and how would I structure a deal to propose to him.

So I shouldn't call mortgage brokerages, I should call mortgage companies?

Call them and verify employee status/account paychecks drawn on?