What should I ask for from the seller?

[Cordero Miguel]

Hey BP nation. I have a co-worker who offered to sell me his duplex for 140k. Current rents are 1k for one side and 1050 for the other. The numbers look pretty good but he told me that the roof will need replacing in the next 2 years and one of the tenants is currently going through the eviction process (court date set in August).

What are some things you would include in the contract to offset the roof replacement and the headache that will come with evicting one of the tenants? I’m trying to limit what I pay out of pocket and we aren’t using a realtor so I not sure what I can even ask for besides 2% seller concessions...