I need some advice on a possible Apartment purchase

[George Frye]

I have run across a great investment. A 28 unit apartment with great cash flow (according to the owner) in a town that is screaming for rental properties. The owner is semi motivated to sale as he needs the money to help fund a new business venture. He is open to the idea of owner finance or lease options. However He didnt keep good records on his property and doesnt have financials or any of the monthly upkeep written down. How should I approach this and what options should I go after?