Closed Tuesday but the previous renters moved back in Wednesday

[Ryan H]

Closed Tuesday but the previous renters moved back in Wednesday.  The place they had lined up to move into ended up being sold so the landlord returned their deposit and 1st months rent.  They had no place to go but still had keys to the place they just moved out of so they moved back into the house I now own.  I had plans to start the rehab next week.

Would you:

A. Begin the eviction process

B. Get them on a month to month lease and start cashflowing (at 10% less rent than you projected) on day one even without rehabbing.

C. Some other option

I think this could work out pretty okay or go really, really wrong.

What would you do?