Well, I'll chime in too since I am in to frugality/voluntairy simplicity AND NT
the first thing that helped me spend less is planning: Before I shop I see what is in the fridge and freezer then plan 7 breakfasts, 7 lunches and 6 dinners (assuming one dinner will be left overs). I only shop once a week on the same day.
Then I buy in bulk as much as I can without giving up freshness. That means we buy 1/4 grassfed beef every 9-10 months or so ( $550), 1 bucket of raw honey every year or so ($60) and other things when they are on sale ( butter etc). We dont eat huge amount of grains ( I dont tolerate gluten well and we are kindof inbetween paleo diet and NT...) but the ones I buy are alway whole, and organic (I mean, two pounds of oats for $1.20...) I dont get raw milk ( thinking about it, here it means getting a cow share and I run a inhome daycare and it would be againast the rules for me to give the kids raw milk, yogurt, butter etc, so I would end up buying dubble...)but I get the not homogenized, VAT pastuerized amish, grassfed milk at $3 per half gallon, make my own kefir and yogurt.
We eat lots of eggs,(like 4-5 mornings a week and often for dinner once a week, the organic high omega 3 ones) and I reuse bones...roast a chicken, eat the meat then make broth with the bones, eat the steak save bones for broth...)
Not all our fruits and veggies are organic but all the top ones in pesticides are. I buy seasonally as much as possible and eat the healthy but cheap ones ( cabbage, kale, brussel sprouts etc)
We hardly ever eat out, I cook all meals for all family members from scratch ( I plan, plan, plan)
We are a family of 4, I also feed 3 extra kids, 4 days a week, breakfast, lunch, and two snacks and our budget is around $125 per week. But I COULD spend a whole lot more
Tanya