I think that the homemade soap does save you money. Recently I purchased the Fels Naptha, Washing Soda and Borax. I think the total cost was around $8 for all three. I made the soap (on 2/7) and kept it in powder form. I am not sure how many loads you are to get from each batch that is made, but so far I have gotten 13 loads. I am very proud of myself and have made some homemade household cleaners as well.
Try it out! Good Luck!