Your neighborhood isn't safe, your building super isn't paying a damn bit of attention, and I know you don't trust the cops anyway –
My friend Darius, as it happens, has had to travel to Europe for about eight months. He has been paying for a cleaning service to come in every week or so, to make sure things are up to shape, but he'd much rather not have to do that.
So.
You'll be responsible for keeping the place clean, no damage – you don't need a deposit, but you'll be paying for repairs if Buttercup damages anything. You won't be paying utilities, either.
Rent's the same as it is now.
He's got another six months to go on his current contract, so you can use that time to work on finding a more permanent solution after you win your medals, okay?