House Hacking - do you need to use a FHA loan?

[John Melenski]

I see frequent references here regarding housing hacking and the usage of FHA loans. It seems most people are doing so to allow rental income to support DTI ratios.

If I can income-qualify for purchasing a property without utilizing a FHA loan, is there any reason or need to do so? On the same token, will a traditional lender allow a duplex or 4-plex to be purchased with a normal fannie may or super conforming loan?