Duplex Deal- Owner Financing-Need Help

[Nathan Cao]

Hello everyone, I'm a new investor looking to learn more about duplexes and how they're different from single family homes.

I happened to called a for sale by owner and turned out the owner has more properties for sale. This owner/investor invests strictly in tax liens; he acquired most of his properties through tax liens.

This duplex he's selling is currently rented 1 side $350 and the other is rent ready.
1 bed 1 bath 688 SF each side.
Asking Price: $36,000
Rent: $700
It has central heat and air, new roof, plumbing work, new windows, he pretty much remodeled this duplex.
I will find out more about taxes and insurance tomorrow. i would guess about $100 a month.
I did the comps for the area and it's varies but i believe this house is worth around $45,000-$60,000. I think i can get it under $33,000 (i will start my offer at $28,000) or lower.
He's willing to carry owner financing with 20% down,9% interest for 15 years.
I have the cash for the 20% down payment but i'm wondering if there other creative ways to do this and save my cash.

I have about $25k in cash reserves and i don't mind using it but it's would nice to save it if i can.

Any inputs advices would be greatly appreciated.

-Nathan