For example, a buyer putting 20% down on a $500k home would pay around $500k in interest over the 30-year life of a typical mortgage at a rate around 6.5%.

Don’t want to pay taxes on the capital gain.

If it has any basis at all (such as you left the apartment during your lease term for what you felt was a justifiable reason and stopped paying rent, but the landlord disagreed) then you may be better off paying a rather small settlement.  

He was pay ed to install a AC unit in my home and disappeared  he refuse to answer the phone calls texted massages he stole my money and won't respond 

Another option is to invest in the market instead of paying down a mortgage.

This is obviously much better than $1,400 per month.On top of that, you will now get 2x the depreciation write-off so your taxes should go down.On top of that, you will now get 2x the appreciation when real estate price go up.On top of that, your tenants are helping you pay down the loan, initially at about $100/mo for both properties, which gradually gets better and better.On top of that, you now have more units so if one or two goes vacant, you have more renters covering the losses of the vacant units.If you want to keep these properties, I would do a cash-out refi and go buy more rental real estate.

Please see the rough numbers below :Tear down house price 350k,Construction cost 165 sqft * 2 build=627k too much for the land unless your exit is 3 million. don't reinvent the wheel. no single family home builder is paying 300k for land. that's miami florida prices where I live. we buy land 50k and under in Columbus Ohio. keep land at less than 10% of after built value.

So depending on how much you pay for it, you can assess your cashflow.

If I can park the 388k ($415-27k) for one year at CD rate of 4.5% and then est 300k (after paying cap gain/depr recap) at 3.0% (assume CD rates lower) that interest income of about 24 months net of ordinary income tax is about the same as my current mortgage.Trying to play devil's advocate and think why selling this year does not make sense. 

While short-term rentals in areas like Kissimmee, Florida, can pay for themselves and offer lifestyle benefits, the ROI typically doesn’t match what I see from my traditional portfolio of long-term rentals in North Texas.That said, short-term rentals can still be a great choice, especially if you're drawn to the area and the opportunity to combine personal use with investment income.