Tenants without a lease on new purchase

[Adam Duncan]

Hey there. We currently have a 2-1  residential property under contract. The property is a rental and has had the current tenants in it for roughly 5 or more years. My question is there is no formal lease in place and we are wondering if we need to have the current owner and the current tenant sign a month-to-month lease prior to us purchasing the property.   The property is in substantial disrepair. We will need to have the current tenants move out. What I am concerned about is with there being no lease in place right now if the tenants decide to dig their heels in is there any reason it would be difficult to evict them. We are hoping that they will go peacefully with a little bit of cash in their pocket. Any Advice would be greatly appreciated.