Portland ADU vs. Multi?

[Taj T.]

Hi All, I'm an investor from the Eugene area, looking to get started with investing in Portland (I just moved up). My preference would be to find a solid multi property, but inventory seems to be very low in this category. I'm looking into the option of buying a single fam primary and building an ADU as a rental property on the lot, or turning a basement into an ADU. Does anyone have experience dealing with the Portland ADU laws in this manner? Successes, failures, other thoughts? Thanks in advance! Taj