What to doif no income statement for multifamily REO for sale?

[Charles Mangum]

I'm looking at a 24 unit in a small town. The property is bank owned and is ~50% full. The bank has been telling the onsite manager not to lease the property for the last 6-8 months. I'm assuming one would just have to utilize pro-formas to come up with the value of the property. I'm wondering what kind of parameters / assumptions I should make in the proforma to come up with a proforma NOI and subsequently the price I would off