Small MF appraisal and comps question

[Evan Salvador]

Hi All, 

I'm going under contract with a triplex in Indianapolis. I tried researching this but it seems to be conflicting information and I'm hoping someone experienced can clear this up for me. I've read that MFs are appraised and valued based on NOI or income approach. But then I found info saying that the income approach is usually used if it's 5+ units and anything under is comped like SF homes. If that's the case, how do you get market comps of triplexes? You have to compare to with other triplexes in the same neighborhood recently sold?