Couple Tenant Issues

[Dustin Mitzel]

I have a couple in my condo that has been fighting and now one of them wants to move out. They have 4 months left on the lease. The other wants to stay and is willing to give me 2 months up front and add her dad as a cosigner. Should I let it play out and redo the lease with just her and her dad or should I start looking for new tenants? Any advice would be appreciated.