I assume, most people don't buy a case per month. I can usually stretch a case of diapers for a good while.
Some people have varying storage options. Some people like me do have spending limits as well.
I do splurge on ABU diapers because they are worth it and are relatively cheap. However when it comes to brands like Rearz, they are overpriced for no reason.
When you see people with huge collections, they are pretty wealthy. I know I'll probably never have a large collection like some people here. I also know that when you buy a case, they aren't that much more expensive per piece than the likes of Molicare.
ABU Diapers are priced right when purchased by case. They hold double that of Abena or Molicare, they have a better tape system, $1.87 per piece for ABU Simple by case. I also don't need the prints, but ABU is definitely a far superior diaper and are worth it.
I save my money up little by little and it adds up. Usually pocket change so it's not a hard burden to buy all at once.
You only live once, you'll try them in fall in love with them and actually come to the conclusion that they are worth the money.
You will waste money buying by pack, so at least buy a half case so you save in the long run. There is a difference in price, but there is also a better product.
With this said, my max per diaper is around $2.00.