4 unit property as a primary residence

[Hayden Hirzel]

Hey all, I have a property I currently live in with a couple roommates so I don't pay my mortgage at all. I was thinking of possibly renting my house out to them and purchasing a 4 unit property. Can I call it my primary residence if I live in a unit and rent out the other 3? My thought is that I can minimize my down payment by doing this. Has anyone done this and what down payment was required?

I live in Metro Detroit area by the way.

Thanks!!!