Since all I'm using as flats are old rags from a couple of bags we had in the closet, I'm using the same detergent and mostly covers that I already had (and some pockets), there was no need to rush to the store.
That is, in part, because this is sort of a training. You see, about 18 months ago, we were hit by a hurricane. And it was bad.
I was still using disposables, but with a couple of boys, one of them a newborn, I panicked and did some panick shopping: diapers. It only took me about 40 minutes to pay, yes, the lines were that long, and I was lucky.
Fortunately we only lost power for a couple of hours, but friends and family were trapped for days on end, without power and, in some cases, even without water. Transportation was halted, gas was scarce and for a few days not even the Subway was running.
Now I know I don't need to go panick shopping for diapers in such situation. I can diaper this guys (well, guy know) in any circumstance, without the need to go out.
But let's get back to the basics. Why, then, is it not as simple to do the math?
Because, I'm still using detergent, and I'm still using PUL covers. I may not have bought them for this purpose, but I wouldn't be doing the challenge without them.
Most of my covers (12) are Real Nappies. Eventhough they are sized, I have used them since Tiny Guy was literally tiny, and I used them with Little Guy even after he turned 3 and needed overnight diapering. Got them on Amazon for $40 a six pack. If I survive with only using 6, that would be a very good investment. But there's a reason I have 12: I use one cover per diaper change.
I don't think I'll be using more than 12, for sure. Now, the soap, I'm using Zote, which costs $1.19 at the 99c store, if I need to buy a new one at the end of the week, I would add that to the money spent, but I doubt it.
Finally, the water and gas. Well, guess what? I don't get billed for water, hot or cold (NYC regulation for appartment buildings).
So, I guess the cheapest you can go if you are not good at sewing and cutting, or can't find fleece or plain simple don't like it, is $40 for a six pack of covers.