How long have you projected you're going to be holding this for (including time to rehab) $750K properties don't trade quickly. 

However, when you trade the simplicity of having only one unit for the economics of having two, you are beginning down the road of long-term stability.If you have one unit, and the unit is vacant, guess what your vacancy rate is that month? 

Because this is a multifamily asset and not a true commercial property, any big swings in RE Tax assessment are going to really affect your NOI.

Solely from my perspective, I wouldn't want to try to retire early with a biggish chunk of funding in the stock market and then get caught in a down swing when I needed to pull out the funding. 

Is it difficult swinging both jobs?

I would 100% recommend having a good contactor for repairs or someone to swing by if needed.

CounteroffersIn the world of real estate negotiations, "counteroffers" are like the friendly back-and-forth you might have while making a trade in a card game.When someone wants to buy your house, they might make an offer.

Property eligible for 1031 treatment is property you purchased to hold for productive use in business trade or for investment.  

mid 500's to low 600's across all 3 scores, with almost zero trade lines.  

BTW - I see you are a barber by trade.