The best solution for reducing costs for household supplies is to eliminate most of them. Items like paper towels, tissues, special cleaning products, fancy mops, etc., aren't needed. Basic cleaning ingredients like baking soda, vinegar, and bleach can be purchase in large quantities at warehouse stores. For items like cloth diapers, check ebay and other online sites and search for "lot" to find bulk deals. Make your own rags and cleaning tools. Other items like bath and laundry soap can be made at home.