As for formula and diapers, I'd just average out what you think your baby would drink per day, per week, per month, etc. I have heard a guideline of 8 diapers per day, which would fill your whole basement for a year's supply of diapers. I'd probably put some cloth diapers (24), with plastic pants, diaper pins, and diaper rash ointment in storage, along with a diaper pail. Our ancestors used cloth diapers, in a disaster, we can too. Good luck!