When we had ds1 we went from 2 sad wages to 1. I ain't remember how much dh was bringing home now (13 yrs ago). Anyways every time we did the groceries. If something was on sale. Ie washing powder, soaps, shampoo even toilet paper. Buy it

We had enough basic household items to last till his first birthday. Toothpaste, washing up stuff, and of course baby items as well. Baby soaps and powder and disp nappies if you plan to use them.