What a great find, though - a single family turned into basically three streams of income, assuming you get an ADU permitted!

Do you think a duplex is generally a better investment than a single-family home for rental purposes?

Freddie Mac only offers financing for single properties they do not offer 'Portfolio loans" meaning bundle them all into one loan.

I would suggest to sell the condo and reinvest into a single family home. 

Similarly, the sale ($575K) minus your adjusted basis determines your capital gain.You may qualify for the primary residence exclusion (up to $250K single/$500K married) if you lived there 2 of the last 5 years.

Quote from @Luis Cerwin: I have a single family house in Detroit (I'm out of state) for past few years.

Keep this to a single page.

Do you want to do Single-family homes or Multi-family? 

My wife and I have a vacant lot in Tallahassee and we're looking to use the current equity to exchange for a larger single family investment property.

I have yet to see an underwriting that holds up to my scrutiny that shows that adding a hands off single ADU in single family zoned area that projects a return that justifies the effort and risk.