Cash Flow on rental property in NYC

[Jeff Morys]

Hello everyone. My name is Jeff Morys and I am looking to learn to use the BRRRR method haha. My goal is to buy a duplex, live in one side, rehab and rent the other half. I want to also rehab my own side and use an FHA loan to House Hack the project. After 1-2years, I would like to rent my half of the duplex as well, refinance the project, and move on to the next project. My question is: After doing the numbers and calculating the cash flow, I will be left with $1700 of expenses which I will pay as “my own rent” on my half of the duplex. I used about 60% of the rent price to determine expenses and added those to the mortgage/tax/insurance costs. Now if I move out and rent the second half. Will I still have to calculate about 60% of new expenses to the second lease??? How do I calculate the realistic cash flow in this case?