Browsing through some of my favourite blogs I rediscovered Rhonda Hetzel's laundry liquid recipe. It requires only a few simple ingredients.
You can find the ingredients and method here: Down to Earth
Rhonda's laundry liquid recipe is extremely cost effective ($1.75 for 10 litres-Rhonda provides a break down) and this is a bonus for my family of five because I wash almost every day. As Rhonda suggested, you can source the ingredients from our local IGA store. It really didn't take that long to make. I don't think I will ever buy laundry liquid/powder again.
I purchased Rhonda's book some time ago and this recipe success has prompted me to go back for more inspiration.