No, cash flow is the money left over after all necessary expenses are paid each month. 

Also make it sellable.Then looking to take the cash leftover after paying off existing loan, to make a down payment on another house or two.

Anything left over is your profit! 

Mostly consists of Millennials entering their prime "settle-down" years who are realizing they'll never afford a home for their family in the Bay Area, and Boomers and Gen X'ers who just sold Grandpa's house in San Jose for over a million and can come out here and buy something all-cash and still have plenty of money left over to retire with.I have written more about this migration pattern here if you want to know more:https://www.biggerpockets.com/forums/621/topics/396725-millennial-migration-to-sacramento-2017---here-comes-the-rushFor some B class neighborhoods, I would recommend that you try looking in North Oak Park, Arden-Arcade, Carmichael, and the area South of 50, East of 99, and North of Fruitridge Rd.

Maybe used or left over.

If you put the $ towards debt you'll still have debt left over but it will get paid off sooner but if you finish the 3rd unit you'll have $1300 extra per month to work with.  

It will allow you to obtain financing at a low rate and you might have some cash left over to pursue other investment opportunities.

What's left over is your profit.B.

To clarify, I am not trying to set up a self directed 529, but rather have an avenue to use 529 funds that might be "leftover" or better used to purchase a rental at the time of my daughter going to college.  

Account Closed  As of today I have only stayed in the Keller area(Buy and Hold), however we do have one house left over in So.