There are plenty of services you can subscribe to to get even better data than the MLS because they give you all sales, not just sales through the MLS. 

Can you give me contact information for 3 current clients who have buildings like mine?

Contact Realtors and network to see if they have any clients who would be ineterested.

Estimated Pro-Forma (based on market data of similar houses in the same area)3. 70% rule Cheers, -Dylan Mathias

What I would like to do is find a list of people who are late on mortgage payments and plan on foreclosing their house or selling to make the payment and contact them and offer a 'subject-to' option to basically absorb their debt and rent out the place until a possible refinance in the future to buy more places.

I had someone contact me about a property I own.

Hi @Patrick Flanagan - feel free to send me a DM or reach out to me with the contact information on my profile. 

He contacted us to inform us that someone would be coming to assess the issue today, the 20th.

If you remember only a Contractor's name, that is ok, send it over to me and I will google for their contacts. 

The FED and other agencies have lots of data for this.