, I purchase another property in year 10 (after I have accumulated enough of the cash flow for another down payment), another in year 15 (because I have cash flow off of two properties), another in year 20 and another in year 25.

Maybe even water accumulated under a refrigerator.

If you want to quit your job then you'll want to accumulate as many units as possible so I like Option 1 given those choices.

This home purchase is contemplated on cash in pocket, if I can get $1,600 monthly on a $83k investment, then I have no intention on disposing of this asset and thus the interim flows will be well above market, and if I sell I will at least recover my investment plus appreciation having accumulated those cash flows.

If this occurs, it would greatly benefit those large institutional investors who have accumulated many investment properties.

How much of a profit should the cash buyer, wholesaler, and home seller accumulate percentage wise?

Either way, we know we want to start accumulating a portfolio of small multi-family properties in the short to midterm.

She says she can make payments of $100 per month until a deposit accumulates, but basically that will be almost the full year's lease to get there. 

FHA was designed to help home ownership not to accelerate a borrowers accumulation of rental properties.For most cases, a borrower can only have one fha loan at any given time.

I plan to do this once a year until I am able to accumulate 3-5 properties.