Advice on getting month to month hoarder tenant out quickly?

[Julie Hill]

We are about to close on a duplex in Alabama that will need a full renovation.  One of the sides is unoccupied with fire damage, the other side has month to month hoarder tenants... two sisters.  Right now they are being very cooperative.  I believe they know what's going on because they have been letting contractors into their unit for the past two weeks (so they can get me bids).  However, I know once I deliver the 30 day notice to vacate, they will be very overwhelmed because they just have so much stuff everywhere (they are even storing some of it in the burned out other unit).  They are also paying incredibly low rent so it won't be easy for them to move quickly with their budget.  I would rather incentivise and/or help them move vs. go through an eviction process as this rehab needs to get started asap (the building is really inhabitable & unsafe in my opinion).  Any tried and true methods y'all have used to help a tenant like this move out quickly and peacefully?

On another note... because one of the sides has fire damage, we are needing to get a builder's insurance policy on the house and they are telling us that no construction can begin until the tenants are out.  Again, the building is unsafe and this needs to start right away.  Am I misunderstanding what they are telling me?  It seems weird that they wouldn't want us to start improving the building right away when it's actually dangerous for the tenants.   And I'm not sure we will be able to get a landlord policy to protect our liability with the tenant AND builders policy at the same time based on what they are telling us (I need to call back again this morning when they open). 

Thanks in advance!  This is going to be quite an adventure!