My first tenant turnover. I'm a little confused.. Please help

[Moises R.]

My tenant will be leaving October 15. I have a family that wants to move in Nov 1st. The new family would like to see the property before they commit to it. And I would need to screen them. 

Do I need to wait until the current tenant moves out and I've repainted the place before moving forward with the potential new tenant (showing, application)? I think they'll have to give their landlord a 30-60 day notice. 

Or do I show them the property while the current tenant is there (it's a moving mess right now)? 

Thank you in advance!