John Hickey congrats on buying a cash cow.

Biggerpockets probably not the place to find someone to buy a note against a business as most of us are only real estate. 

2. how to know where to find a B,C,D areas\neighborhoods in cities\ countries.3. how do I know if a property is worth the checking\ buying?

This is like buying any other property, it is valued at whatever the market is.  

Investment Info:Single-family residence buy & hold investment.

(or if they're primary buyers, they don't care about yield, since they're going to live there.)i just went to visit two very distressed properties yesterday that i would buy.... if they were priced 50% lower.  

I see a lot of investors buy good investments, but then they lose tens of thousands because they have no idea how to manage.

Investment Info:Townhouse buy & hold investment.

Consequently,  there's rarely enough of a deviation in price between these auctions and what you can buy on the MLS/elsewhere with full diligence capabilities to make these transactions worthwhile. 

Are you agent yourself and what makes you say that you'll avoid buying a home under 1000 sqaure feet again?