Buying a duplex with a non-occupant partner

[Cornelius Johnson]

Hey BP folks, 

I'm planning on purchasing a home in Cleveland sometime next summer. I am considering the option of purchasing a duplex in a C+ or B neighborhood, and a partner is eager to join in on the investment. In terms of qualifying for mortgages and submitting a down payment, what is the best way to approach this in order to take full advantage of any tax deduction, qualification requirements and varying types of mortgages? 

Happy to provide any more info as needed. Thanks!