Trying to get a owner finance

[Ray Agosto]

Hello BiggerPockets community, first I haven't been here in awhile but I ran into a real estate stump . I recently seen a single family two bedroom house for sell he brought it for maybe 90k and I wanna obtain the property for my first rental but also he didn't really finish the inside up so it's still kinda gutted. My question here is how would I approach him on the idea of owner finance and is it also possible to budget in rehab costs as well.