We need to do a no fault eviction (our first) in order to owner occupy to satisfy the FHA requirements for our turnkey duplex, and while I have some corporate law background, I don't know what landmines are waiting for us as we approach the eviction process of the tenants in one of our units...

What do I need to know?!

Does the owner occupy category make things different to evict in Oregon?

How did you get an FHA loan on a duplex with both sides occupied??? 

You might try to offer the tenants cash for keys and try to get them to move out without any issues.