I tend to buy fresh, lean, locally produced mince. I love mince, I like the smell of it cooking with Onions, I like it as meatballs, as a Jacket potato topping, as a cottage pie......I like the fact that you can use just 100g to feed a family of four, by padding the ingredients out with pulses, such as cooked green lentils or red kidney beans.
Currently in Aldi a 500g tray of mince is around £2.50, (divide up and freeze seperately in 100g portions) and a tin of kidney beans just 19p, so the Toro Rosso Pie comes in at less than 70p per head. Try the butchers though, our local butcher will give us 50% more for the same money.
Try a couple of the recipies here, and you will discover other ingredients which you can use to pad out mince without breaking the bank or compromising on taste.