seller financing with a duplex that needs work

[Nolan Mahoney]

I came across this dupelx that the seller preferes owner financing. The property is going to need work in the 1st unit and some exterior aswell. for example on the interior it will need (from what i can see on MLS) is Drywall celing, new stove and a new door and the miscellaneous. As for the out side it will need some chimney work, aslo looks like a crack in the foundation and some paint.

How would these repairs go with seller financing? Who would pay? If there are any books you could recomend or any advice would be great, thanks!