First move out inspection, guidance?

[Michael King]

This is my first self-managed property, a 4 plex I closed on this week. One of my inherited tenants is moving out on the 25th, although the lease is to the 31st. That said, he arranged the gas to be switched back into my name on the 26th. I believe that in this case I will now be entitled to take possession of the apartment on the 26th and prep it for the next renter. I have emailed him to advise the move out inspection will be on the 27th. He told me he wanted to do the move out inspection on a weekend, but that would mean waiting til Feb 1st. The day I nominated to do the inspection, he will have to take half a day off work if he wants to be there. 

I know this is a minor detail with an obvious answer to many here on the forums, but as always, you don't know what you don't know and I'm wondering if maybe I don't have the right to do this since the lease is up at the end of the month. Maybe I should have waited til the lease end date and then deducted the gas usage from his security deposit? It would have only been a few dollars, so it's not the money, it's the technicality that I'm interested in here. 

Or would it be considered abandonment since he's cutting the gas off on the 26th? 

Someone slap me and steer me in the right direction please? I hate overthinking stuff.