We have it set up where they can upload their proof on a regular basis right in their online tenant portal.

This is expensive but you'll have a place to work and meet with people when you're in town that matches your online presence.

unfortunately this marketing specialist was NOT a specialist in marketing for real estate businesses, did not understand the unique requirements and characteristics of real estate, and hence implemented their “generic” on line marketing program.  

This is merely what I've observed from the content I 've seen online. 

The real work is locating these properties and I've learned the best way to do this is to work in towns/areas that have online GIS systems that map; topography, wetlands, soils, etc. and assessors data available for download either from local sources or listsource.com.  

Networking through meetups and leveraging online communities like BiggerPockets can provide invaluable support and insights as you take your first steps.Good luck!

The site is no longer online.

This may be because (1) until recently interest rates were trending lower so if the lender is getting a higher rate on subject note than he can obtain on new note there’s no monetary incentive to call the note (2) in the past technology did not exist to identify the property transfers (ten years ago county recording docs were not online) and (3) the lenders rather collect payments than own property.  

While the owner is free to sell the property and the information about how they run it as a business, AirBnB does not allow them to sell their online identity for the platform.

You can find online mortgage calculators that allow you to play around and see what happens if you do an extra payment or increase your payments.