At least an LTR tenant needs a place to live and a good reference. 

------------------------------------------------------------------------------------Recommend exploring as many sources as possible to get referrals AND cross-reference them to get as much accurate information as possible.Check out NARPM.com, BP’s Property Manager Finder (BiggerPockets: The Real Estate Investing Social Network), etc.Also, encourage you to learn from the mistakes of others - by reading posts here on BiggerPockets about owners not having their expectations met by their current Property Management Company.

Don't know about that link you were referred to.

I've regularly attended the auction in Brooklyn, but never bidded on anything.

Obviously, using the online listing page at ALE solutions is different than a cold email, and I am referring to the latter.That brings up an obvious question: how do you develop those leads, then?

How is the market and opportunities this time.and if anyone can refer me a good property management in the area.

What about character references from your tenants application? 

OPM usually refers to money to buy the house, a private lender, family, etc.

It's referred to as VTB (Vendor Take Back) or Seller Financing.

However it is typical to allow the lawyer representing the lienholder (lender) to make an unofficial bid referred to as the "upset price".