FHA, Multifamily and Use of Current Rents as Income?

[Reece O.]

Hello, I have read when applying for a FHA loan you can use 75 percent of currently rented units for your income. Is this true? So if a duplex rented $500/unit, could I add $375 to my income? How is this affected if both units are rented? I assume I cannot use the $375 twice since I will have to occupy one of the units after closing. Can you do this only with FHA? Thanks!