I've already written quite a bit about this topic, so I'm just going to throw out a few ideas before I suggest you click on the links below for more information!
In this post, Catherine suggested we get a scale that can weigh down to 0.01 grams so we can make 10 gram batches of lotion! I've never tried it, but you'd really save money on those expensive ingredients if you did that!
You should have all the other equipment lying around your house - spoons, forks, Pyrex jugs or Mason jars, mixer, and funnels!
Creating products: Equipment (part 1)
Creating products: Equipment (part 2)
Creating products: Equipment for measuring pH