What is the time period required before refinancing?

PERIOD.

Also, I believe I saw somewhere that the mortgage won't count against the original owners DTI after a period of time if they show someone else is paying the mortgage.

Those are some amazing #’s in that short period of time.

It’s good to budget for unforeseen expenses.Regarding PMI, it’s worth discussing directly with your loan servicer since many lenders require holding the property for a period or reaching specific equity thresholds before removal.If market rents are $2,200–$2,500, hiring a property manager could help you optimize rent while taking the burden of tenant screening off your plate.

You could negotiate terms such as a lower interest rate or interest-only payments for a set period to ease your upfront burden.Lease-Option Agreement: If the landlord isn’t ready to sell outright, consider proposing a lease-option where you continue renting for a set period with an agreed purchase price.

I have clients doing 1 a quarter thats about the slowest to others that will go on a mini tear and I will help them buy 5 or 6 over a 45 day period then they go to work.But generally my busy folks will do 15 to 30 plus a year..

My favorite source is Navy Federal for its long draw period of 20 years, and Figure for its fast funding.  

@Jordan Kaylor @Jeanette Land    Seasoning requirement is a industry term for waiting period.

REPS does not relate to STR's.For short-term rentals (STRs) with an average rental period of seven days or less, you don’t need REP status to offset losses against other income.