It might be worth also thinking about getting some childcare. Even just one day a week can give you the capacity to whip through a lot of those errandy/shopping/organising type things, or you could organise your market trips around those times. It might seem counter-intuitive (as it costs more $) but if you're on a very low income you might find you're not paying much at all. And if you're efficient with that time, it can mean that you enjoy having a cafe stop occasionally with your girls, instead having to stop and feed and water everyone in the middle of trying to get whatever errand/shopping done.
Agree with that one. I find I can get so much done, with little extra expenditure, as I am on my own. Also lets me have time to check out the clearance rack for specials or to really compare pricing.
Also childcare is entertainment for them. As they can paint, craft etc there, it means I can cut back on that type of expense at home. Plus they are also fed, which means less out of your budget