My broker advised me to "bite the bullet" and close the deal, telling me that I should be glad I wasn’t losing money on the deal.

I’m currently working on a deal in Fort Lauderdale & actively looking for financing solutions like hard money or private lending.

I've never heard money/profit described as cute, so it's not important.The most important thing you mentioned, was the rent potential and ARV. 

Would like to get that money back out in 6-12 months.There aren't as many smfh available near me right now. 

And she's hardly saving money if she's using an electric space heater as the only source.

That will determine if you could sell it and use the money to buy a single family home or would need to take out a mortgage. 

Interesting idea, but I suspect that would create more problems than it is worth.Most of the leverage you have with a NNN lease is that you are working with a company, presumably one that makes money. 

Alternatively, I could explore hard money lenders.

Instead I want to take advantage of the opportunity I have of living rent free to invest my time and money in STR's to hopefully build that portfolio up and eventually make that my main source of income (I understand that will take time).

I have never heard of this metric and don't see any information on it online.