I understand that they can be dangerous from the perspective of historically they were predatory and people purchased properties that they couldn't afford, getting hit hard with the intro interest-only period of 5/7/10 years expire... but I see it as a flexibility option.

Throughout my period of educating myself, I have been learning what I know, what I don't know and everything in between. 

3 bed/ 1 bathroom/ 1,300 sqftPurchase Price: $185k Rehab/Cash Invested: $22k/$50kSold Price: $249kNet Profit: $41kROI: 20%Hold Period: 4 months 01/11/20-04/10/20

@Cristin Rakestraw interest calculation and pay back period are two things I use often.

I think that is probably the underlining reason for the 5 year holding period. 

Investment Loans (My family is  not likely to want to house hack during this period after 6 moves in 8 years. 3.

You also need to factor in your hold period.  

You need to indeed figure out what it takes to be successful completely irrelevant of your skills or what you want to do, and then figure out HOW to get it, period.

@Thomas Helm a cash out refi restarts the 12 month wait period.

If it was a written lease, there should be required notice periods written in.