So, in researching just how exactly to build relationships with private lenders, I get the notion a portfolio of past experience would help.  

The reason behind this is most private money lenders are not licensed to lend on single family properties.

Naveen, I can send you the link via private message as I'm guessing that was why my post was removed.

I considered opening a business account with business credit, get with brokers for private lending options.

The one that promotes itself as "the largest privately owned real estate firm in the country". 

What are some other 'perks' in an investment contract the private money lender will look for or consider standard?  

I did not try to factor in - raised rents, appreciation, and etc..My cashflow is right around 4k/month and this factors in all expenses, repairs, capX, management, and private funding (16-20% of gross rents).

Devin Mann as an investor you want to show up in the worst condition but reliable transportation you can find.My challenge sometimes is finding a beater (cheapest car I have is a Benz and my others are exotics) for particular areas, so sometimes rent a car or take my bike.

Has anyone had experience investing with Frederick Bates or Scott Stringer in a project?

I have private money that I could see being easier than going to a bank and getting a mortgage on the property.