Dedicate one checking account and credit card exclusively to real estate.

Focus on rebuilding your credit, saving for a down payment, and learning the local market.

At the moment with 3 rentals (6 total units), I have one account and a credit card associated with it.

Take out an equity line of credit on the property that can be sides as the down payment for the primary residence.

The homeowner collects a NET/NET 5% yield with 1% increases each year in long-term lease by a BBB+ credit rated tenant (similar to Morgan Stanley credit).

If you go into A/B Class the rents are going to be too high to justify doing section 8, meaning market rents are higher than Section 8 is able to pay.If you go down to D Class areas you're going to attract terrible tenants and it will be a nightmare. 

Whether bank or credit union - either will work. 

Charges them all for parking passes (on the lots I own), charges for pets, charges to empty the coin op laundry, charges for credit checks etc.  

I left of the last R because even though it would like to repeat in Brooklyn I'm not sure my credit will stand it at this point.  

The credit score is the single best indicator of how one pays their financial obligations.