.$2200 (rent) * 0.5 (50% rule) = $1100 expensesYou did not indicate your LTV so I will use 90% LTV in this calculation   Higher LTV will make the cash flow worse but the ROI likely better and vice versus for lower LTV  $2200 (rent)  - $1100 (expenses) - $1060 (debt payment at 90% LTV) = $49/month cash flow.  

@Mark Ainley The ramifications are huge and will take months to be calculated.

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BLUF: used the BP calculator but inputs (rental history, expenses - still unknown; I guessed) should I set some scenarios and go?

From that, plug into a calculator such as a rental property calculator (google that keyword), plug in the income and expenses and see how it cash flows for your return requirements (cap rate, IRR, CoC or on a per unit basis).

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Just make sure the points and fees you're paying up front are being considered in your calculation. 

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How do you calculate cash flow?