Tenant in poor health

[Eric Z.]

I have an interesting situation here. 

The lease expires this month, and my PM recommends a month to month lease. PM said the tenant is not in good health, and may need to move to a care home any time now, if she moves to a care home due to poor health, the lease is not enforceable anyway. 

The last time I had month to month lease, the tenant moved out during Thanksgiving, and took me 5 month to rent the place, so I'd rather not to do a month to month lease, but the same time there is no point to sign the contract if I can't enforce it. 

What would you do if you were in this situation?