I'm constantly juggling the rates for my Airbnb listings based on what my competitors are charging. 

You'd learn and potentially earn a profit at exit.Another way is to wholesale the land.

Strive for constant improvement, adapt to market changes, and continuously learn and develop your skills.

If you pay cash, you don't have a payment, but effectively you are giving up an income stream if the cash had been in a bond or ETF and earning you either interest or appreciation. 

(Unfortunately, the investor fell for this gimmick and did NOT get their own 3rd party inspections, appraisals or even visit the properties they were buying, against our best efforts to encourage proper due diligence and follow our check list for their own protection.)So now some people are stuck with properties worth half what they paid (not all RWN members), with no renovation done, and constant repairs and vacancies. 

I don’t have a loan on the property and hold it cash, but, if I sell it would lend the profits as hard money and earn 10%+. 

With rates in constant flux, you might have opportunities to lock in lower ones.

If they get married it will help her earn SS benefits, etc etc. 

Quote from @Diyan Yap: Have you thought about AirBnB, they can visit/stay with you while they rent it and earn income. 

One more reason why people should stop looking for the easy path to building wealth.Increase earnings, reduce expenses, save, and invest.