This is a guide on how to train Enchanting economically.
As this is intended to save you money, buy only the materials you are sure you will need. If you run out, buy more. It is always more cost-effective to gather your own materials, rather than buying them. Avoid having extras, but if you do, try to sell them back on the Auction House.
Because Magic Essences (e.g. Lesser Magic Essence and Greater Magic Essence) can be freely changed between their lesser and greater forms, section totals will be in lesser forms. Step totals, however, will show whichever form is needed to complete the step.