In our house a chicken would not last that long though. We had roast chicken last night ( Aldi, free range about 5.99) with potatoes, carrots, peppers, onions and a few more random veg. The dinner probably cost more like 10 or 11 euro if you count in the veg. There will only be enough left overs for potato cakes OR two adult lunches. I've made chicken stock before with the carcass, but I've plenty of that in the freezer. And anyway, that's just stock. We have 5 to feed in our house but the thread was about feeding 6. So I don't see a chicken lasting as long for 6.
Also I know I'm using freerange but that's a conscious choice.