Tenant moved out 6 months early and left a trashed apartment - best course of action?

[Benjamin Sawicki]

Hello all, hoping for some advice on a recent situation. A tenant I inherited when I bought my place (who pays 50% below market rent, and no security deposit or last month's rent via previous owner) just informed me with 11 day's notice, that he was moving out on Dec. 1st. We had just signed a 6 month lease with no option to renew, because the apartment has so much deferred work that needs to be done. He and his family are very low income so I'm trying to be flexible with them and their situation. While I'm glad they found a good place to move that suits their needs, they really left me in a bind. I'm not happy about it, but I can accept them moving out early, but he moved out being a month behind on rent, and with piles and piles of furniture and trash left in the apartment. There is food in the fridge and a huge chest freezer full of stuff.

I'm owed $1000 in back rent, and I'm estimating about $1000 for hauling away the stuff from the apartment. Oh, and surprise, he hasn't returned phone calls or texts. All calls and texts from my end have been very professional and requesting to work things out in a peaceful way that works for both of us. 

What's the best course of action?