I only support myself and another family member. As a result, we have very small laundry loads and use small amounts of shampoo, detergent, etc.
However, I hope to start a family of my own someday. Time to start thinking about opening a Costco account, LOL. But I digress.
Less is more, in my opinion. Use what you have around your home as sparingly as possible. Anyway, that is just my opinion.