Seeking advice on financing in NE PA

[Davis Stoner]

-I have a multi unit under contract (1 duplex and another unit that is a different building)

-Closing date is April 30 so time is of the essence

-I am planning to house hack so I would like to finance with a primary loan (hopefully 10% down but everyone is telling me 20% which I can do) 

-This is my first time getting a property under contract so any and all advice is appreciated!!

I was working with a mortgage broker and an appraiser has deemed the property a "multi-unit property with accessory units" in the back which Fannie Mae doesn’t allow. That financing has fell through. So now I am reaching out to local banks in the area. As of now I am getting quotes from two. Does anyone have any advice? Is the financing that I am looking for obtainable?