December tomatoes

It's December and we have tomatoes ripening on the vine in our unheated hoophouse. Homer's plan is to keep these plants alive all winter and really have a jump on the 2012 crop. I'm concerned about the 2-3 nights a year when the temperature drops to low single digits..it is hard to imagine the plants lasting through that. For now we are each formulating a plan to convince the other why this tomato should not be shared..