3 Family with Owner Financing option, need advice.

[Gabriel Kolendrekaj]

I have an opportunity to buy a 3 family house where the Owner will hold 20% as a second position as a 30 with a 2-5 year balloon at 5.5%, If I can find a bank that will do 80% as a 1st position. He even offered to allow concessions for closing costs(if legally allowed). I'm trying to buy the place with no money down, does anyone know any bank that would do this?

The property needs about 25k in work to bring to my standards, though its liveable and mortgageable as is. 

Rent Roll is 4,500 a month, Taxes on this house are 1800, water and sewer might be another 1800-2000. Separate utilities. 

I don't have 20% to put down right now out of pocket, and I don't want to let this opportunity slip me by. Any advice would be appreciated.