I feed my family (and I have five children) on about £90. This includes veg, fruit, treats, fruit juice, packed lunches, etc. No one goes without anything or has to eat anything they don't like. I don't do ready made stuff (too expensive for all of us) and that includes at least 3kg of cheese a week (at £15). Although I am lucky in that I don't work so have the time to make stuff, not so easy if you are working.