@Yonah Weiss is the main man on using component depreciation (cost segregation) 

Another important component of educating yourself is understanding the actual asset types you're investing in.

The interest rate is only one component. 

It's the most important component of investments.  

I notice that on wholesaling calculator on this BP, there are section for "estimated repair cost" and under that section, it has Exterior Repairs: Roof, Concrete, Gutters/Soffit/Fascia, Garage, Siding, Landscaping, Exterior Painting, Septic, Decks/Porches, FoundationInterior Repairs: Demo, Sheetrock, Plumbing, Carpentry, Electrical, Interior Painting, HVAC, Cabinets/Countertops, Framing, Flooring, InsulationGeneral Components: Permits, Termites, Mold, MiscellaneousWould this be good enough (complete) list in which I can represent this list with (columns of labor and material costs) to the general contractor and be assured that I would be able to get a good ballpark precise range of estimated repair value that would be valuable to the end buyer/flipper? 

I need this service to thrive as I can see it being a key component of my expansion strategy.

If the mold was a detriment to her and/or her children’s safety she could have LEGALLY moved before an eviction.

@David H.I agree with the others screening is the critical component.  

Are there typical contract components that would bind the buyer appropriately to cover the payment of the loan and give the seller some type of recourse if they didn't?

Marketing, including direct mail, is not an event; its a basic component of how you make the phone ring and put food on the table.