The amount of diapers depends on the type of washable diaper and the number of times you can wash per week. A night diaper has a longer drying time than a pocket diaper. If you also use the night diapers during the day, you will need more diapers.
Do you not get the stains and unpleasant odors from the diaper, despite washing several times? Does your baby suffer from diaper rash? Do your diapers leak even if you just changed them? Then it is useful to strip them.