3 duplexes 1 seller

[Travis Taite]

Hey, Could someone help me calculating a deal. I’ve met a seller. Who has 3 duplex’s he asking 45k a piece for them but said willing to make a deal if I get all three. As of now they have 0 cash flow and will need some work. Rental rate right now is between 580-620 for the area. I’m looking to do the brrrr method.  My dad is a license carpenter and I work at a plywood mill and get good discounts  so I’m pretty good at calculating the rehab cost. But need help structuring the deal and calculating the arv. Thanks for all the help you’re willing to share.