As a frugal single guy I too am quite impressed by the numbers shown here.
Transport : $18 p/w
Car Fuel : $70 p/w
Coffee/Snacks etc : $25 p/w
Rego/Insurance : $75 p/w
Meals outside of home : $100 p/w
I am still living at home and spend $288 p/w ! Those who are on <$100 p/w probably...