Request help with technical question regarding multi units

[Brian Thurmond]

My question is in regard to what the government secured loans define as suitable. The property is three structures. One duplex that is 3/2 on each side. Two single-family that are both 2/2. They are co-located but wired separately. There is a space between each structure. 

This is not a traditional quadruplex or fourplex etc. I want to know if it can be treated as a quadruplex if all are purchased together. As I said, they are not attached,

My question is this: would someone know what rules and definitions FHA and HUD (where to find, a link to would be fantastic and greatly appreciated) apply to FHA financing?

I would claim one of the units as my primary residence and rent out the others. I am looking for a non-commercial loan, with a lower interest rate, lower down payment percentage, etc. 

Maybe someone knows a post or blog on BP that addresses this very question, or a link to the reference information. I had no such luck finding anything in regard to the above. If anyone would be so kind. Thank you.