Well we spend less than 100 quid a week and there is 5 of us, 2 adults, 11 yrs 4 yrs and 1 yrs. We shop at aldi for the most part and get a few odds and ends that they don't do from asda. We don't buy organic or free range (apart from free range eggs and sometimes a free range chicken). Plus I eat plenty.
Protien for us is mince (less than £2 for 800g) chicken pieces, whole chickens and cheap cuts of pork, salmon, steak and lamb are rare treats, unless they are on short date. I eat offal too, cheap as owt, but the rest of the tribe don't really like it much.
That's how we do primal and it works for us
The £1 meals blog is good too - though I reckon you'll be looking at £2 meals for a decent bloke protion
You know all those pictures of Adam and Eve where they have belly button? Think about it..................... take as long as you need........................