Yes - SW ain't a cheap menu to follow.
Kidney is also very cheap and I can send you some lovely recipes if you'd like them as I adore kidney.
I wrote a long ramble on this a while back - it's on my thread here
http://www.minimins.com/3566425-post82.html
But the hilights are:
Bulk out your mince in spag bol with grated carrot (80g mince to 40g carrot). It also makes it a green day spag bol. Perfect!
Shop in the supermarkets at the end of the day - you can get some fantastic bargains on meat with a sell-by date of same day. As long as you cook it next day it will be fine.
Do you have a local butchers? Try them out - you might be pleasantly surprised as they often have some great bargains so as to compete with the big boys.
Buy your fruit and veg from a market - it's usually cheaper than the big supermarkets. Having worked in Geest for a while and seen how it gets allocated there is absolutely nothing wrong with market veg. It is just usually the wrong shape or size for the big boys to accept!