@Cody Godfrey @Cody Godfrey PHFA is Pennsylvania Housing Finance Agency. It is a state bond program through PA. We usually have clients that need down payment assistance use their program.
The issue I see you having is that you cannot have two FHA loans and you do not have the capital required to go conventional. So the best way I see going about it is to refi the current house to a conventional loan and the purchase new house with and FHA loan again. Which is sounds like you were already thinking. You would obviously have to owner occupy for a year in the new purchase. That would not only allow the lower down payment but also gives the advantage of full 6% seller assistance if you can get that negotiated.
As far as the refi goes, you cannot have a loan to value higher that 85% on a 3-4 unit, see below Fannie Mae eligibility matrix, so
https://singlefamily.fanniemae.com/media/20786/display
Is anyone else on the current loan with you? They could do an FHA refi to get you off the note then you can go buy the new property FHA. Granted that only really helps if the coborrower is family member or spouse who is interested in keeping your investment.
I also live in York and bought my first duplex in December