I also am exploring doing RE from my couch, so I can do deals in different areas. 

I recently read an excellent article by Michael Blank about synidcating SFR and small multifamily deals.  

I wrote an article for Bigger Pockets on the proper way to buy a home with cash HERE.

He is the founding co-editor of The Wharton Real Estate Review and has published over 80 articles during his career.

 Welcome to BP Naftal, there is a lot to learn on this site with blogs, podcasts, articles and these forums, read and listen. good luck with your future Business.

But have you explored direct mail, knocking on doors, working directly with sellers?

It is up to a bankruptcy trustee and judge to accept an offer.Here's an article I found: http://www.findwell.com/blog/buying-a-home/buying-...As far as seller receiving money from sell price higher than payoff -- my opinion is if the house is foreclosed upon, and the property has little value other than land component (highest and best use a house tear-down), there is no guarantee the bank will sell the property for the full value of his payoff, especially considering the bank could sell to an investor at a discount, such as you were offering.  

It is an article from 2014 but it is an interesting look into the mind of a billionaire.http://www.dailyfinance.com/2014/03/24/warren-buffett-real-estate-investing-secrets/

Good question.I am exploring manufactured homes (mobile homes) for their potential.

I suggest you read this BP article for ideas:https://www.biggerpockets.com/renewsblog/2016/01/1...Now To answer your questions:1.