Utilizing 3.5% twice

[Jacob Borszem]

Awhile back I watched a video from the JayMorrisonAcademy on youtube. He discusses being able to use 3.5% twice for a down payment on a house. Jay states that you can use 3.5% down payment twice if you live in a duplex and then upgrade to a single family as long as you have leases for the duplex when you move out. Just wondering if this is correct and if so can this method be used on a house hacked property? House hacked being a house that I live in and rent out 2 other rooms. Sort of like a duplex or triplex in a sense. If none of this is correct is there any other ways for me to finance my next home purchase without using a 20% down payment?