Benefits of 2 night minimum:
- easier to maximize occupancy rate
- higher profit margin, if you charge cleaning fee
Benefits of 3 nights or more:
- fewer changeovers = less work, laundry etc
- lower odds of getting party guests that damage property
If you're on the fence, there's a third option: you can set a higher Minimum Stay as your default, and if you have in-between dates in your calendar that you'd like to fill, you can set a lower minimum stay specifically for those dates. Have a look through your Calendar settings, there are many ways to customize.