Mince, what more can I say, it is one of the most versitile meats out, and if you grab a few kilos when they are on special (bilo regularly sells it for only $4.95 a kilo:eekit is by far one of the cheapest to stock up on.
Here are some of the things we use it for:
Shepards pie (you can just brown the meat, add a little gravy or cornflour, and then either top with mashed potato, or deb potato)
spaghetti bollognaise (if you put a little sour cream, or plain yoghurt in it, it is absolutely yummy
Meatloaf
rissoles
sweat and sour meatballs and rice (we just use a bottle of the homebrand sweet and sour)
lasagna (simple spaghetti bol base, make up a white sauce, and layer it with the sheets of lasagna, very cheap, and a sure fire winner)
home version of beef stroganoff with pasta (brown your mince, add some sliced zuchinni, corn kernals and sliced beans (frozen homebrand is ok). When the veges are soft, add a 300ml carton of sour cream and turn down to the lowest heat setting, and then cook a whole pack of spiral or shell pasta. (homebrand sell it for like 59 cents a pack) then when cooked, mix through the meat and vege cream base. this is one of my family's favourites, and it freezes so well, so you can always have a couple of nights worth in the freezer, and it is really cheap to make.
home made pasties (just make gravy mince, with some homebrand mixed veges in it, and roll it up into little parcels using homebrand puff pastry, cook in the oven until nice and puffy.
Beef Roulades I use also pork mince for this, but you just take your raw mince, maybe some crushed garlic if you like it, add a little salt, an egg and a handful of flour so it doesn't crumble when cooking, and you spread it onto a sheet of puff pastry, leaving a couple of cm's on top without the mince on it. Roll it into a log, and put in the freezer for like 20 minutes to stiffen up so you can cut it. Slice the logg into about 1-2cm thick slices, and pan fry in a little butter or oil (i have tried just using the spray oil, but if you dont have a nonstick pan, they will stick and burn) turn and cook the other side, serve with veges, really yummy.

There are others we do, but i would be here all day.
Good luck with it hun, I think we have all gone through a spot where funds are low, and we have to get imaginitive with our meals to make our budget stretch further.