Soapmaking is becoming a way of life. I too am like Pippi and make my soap. I do include the animal tallows in my soaps and they are readily available and have formulated several recipes for the soap. Knowing where to get the required ingredients in sizes that are cost saving is another step.
I make my soap because I do not want the detergents that are made by the big soap companies and the snythetics or the petro-chemical based end product. I use castor oil, coconut oil, olive oil, vegetable shortening and a percentage of beef tallow and lard depending on the type of soap I am making (body or face).
There are sites on the web that will help you formulate a good bar that does not break the bank.
I usually make about 20 to 25 pounds at a time and break that down into smaller types of soaps - oatmeal, vanilla/lavender, citrus surprise and others as well as the basic "plain jane" soap bar.
Happy soap bubbles.
The other S.
PS You might want to start with a bar of soap that has more of the basics on a smaller scale. Try www.soapcalculator.com and Magestic Mountain Sage at www.thesage.com for ideas on making smaller sized batches.