Aldi is your friend in the UK.
Eggs are just over £2 for 15 free range
Mince beef is under £3 for 800g (that is a frickin huge pack)
Frozen chicken protions are less than £2 for a kilo IIRC.
The fruit and veg is cheap, as are the nut and ground almonds.
We are self employed, earing bugger all so living on Working Tax Credit and Child tax credit and paying a mortgage out if it (we'd be far better off on the dole in a rented house) we make do for a family of 5, and I eat a lot, on about £100 a week, sometimes less if I get to the local co-op when the meat is marked down, then we get more of a variety, we even had lamb mince and a whole duck (£4) last week
You know all those pictures of Adam and Eve where they have belly button? Think about it..................... take as long as you need........................