Confused about the 50% rule and my calculations , Did I do it right

[Shema Turner]

Hi BiggerP,

I am super nervous about buying my 1st duplex and I have been doing a lot of researching on biggerp and the 50% rule has come up lots of time. If my biggerP family could assist me with the below, are my calculations correct.

Purchase price is $27000 , Renovation $5000

Loans amount $30000 (no interest, loan from a family member, however I pay them back between $300-500 monthly)

My calcualtion

$600 * 2= $1200

50% rule= $600

remaining $600-$300(loan)= $300

$300 cash flow or $150 per door.