I have... 36 nappies! 10 of which are kept in "reserve" jic I run out (eg nursery needs cloth because DS has nappy rash).

That's enough so that I wash twice a week or so and don't have to worry about drying, I usually get to 10 nappies then wash, I have 3-4 left in a wet winter when I can't hang out to dry and don't use the tumble dryer.

So two dozen is enough (I use 26 normally), find the nappy that you like and go with that.