You need robust escape clauses that you explain to the buyer ahead of time.  

Thanks for giving a heads up.

You're already ahead of the game!

Sounds like you're losing out on rent for September, October, and November, plus have a difficult task ahead of you to get the apartment back in shape to sell, or may need to offer a discount to the buyer.

Once you get enough money to cover a downpayment, go ahead and start making offers on properties.

If you 1031 I can see doing it, if you just cash out it makes it hard to get a simular return in a different vehicle especially after taxes. 

Just a heads up to check both your Homeowner's policy and Rental Insurance policy to see if you are covered for riot, terrorism, and civil disorder problems.

Yes, I love that triplex for potential, esp if they do go ahead with developing that old high school complex as planned. 

I'm just gonna go ahead and guess that most people just make their own spreadsheet for what I want.  

approach this is just to multiply $122 by 12, divide by $8,000, and ask yourself if you can put that $8k to work earning more than that, in which case you'd come out ahead via arbitrage.