It sound like she's got some way to go with her spending to get to truly mustachian standards, but the author cut her spending (sounds like everything but housing) from 515/week to 151/week.
http://www.xojane.com/diy/99-days-at-the-99-store-day-50No clue on the quality of food (99 cent stores around here do not have produce), but she's got the right idea!