The buyer only pays interest so it's all straight profit while your underlying loan is amortized and reducing over time (another pillar of profit). 

Just make sure there is no restrictions to the extended stay model in your loan documents.

The best mortgage rate for your investment property that is available to the general public is going to be in the form of a conventional loan.

Hey @Alex Springer      What sort of loans are you seeking?

. - Can you try a hard money loan? 

You will more than likely get a higher rate then what you have now but its a simple short term loan that you can refinance in 12 months to lower the rate when rate drop next year (which they will).Use the cash for the DP but I would also advise taking out just a little more as a "What if factor" to cover any unforeseen issues or last minute repairs.

A refi may or may not help the cash flow depending on current rates vs. new loans.3.

Before your loan closed, did you roll into the mortgage 6 months of your mortgage payments? 

I had moved more than 50 miles because of work and my FHA loan had a clause where I was automatically approved to buy a house with 3% down in that scenario.

Im gathering some information to have a better understanding with a FHA Loan for my first house hacking multi family property, and how to convert into conventional  loan or commercial loan .