BRRRR calculator help

[Gigi West]

Hi, I am new to RE world. 

I am confused about the calculations. Can someone help?

I am looking at a property for 130k, including the rehab, all cash hml loan, ARV will be 200k

Estimated rent is 1750

I would refinance after 12 months

So, my refinancing would be for 150k (75% of the ARV), correct?

Am I supposed to calculate two different calculations? Brrrr for the first part(purchase+rehab), and a separate calculation for the rental property numbers after the refinance?

Thank you in advance.