Hi ladies! I tried to search for a similar topic and didn't find anything, so I'm sorry if this is a duplicate.
I have a 10 month old who wears BumGenius 4.0s. I have about 25-30 one size diapers and wash every other day (he's in disposables at night). DS will be 18 months when baby #2 comes along, and I'm wondering how much I should increase my diaper stash by. I hope to start potty training DS a little bit after baby #2 is born, so I don't want to double my stash if DS will be out of them soon... but I also don't want to be stuck without diapers.
Any advice or experience would help!

Edited because words are hard.
BFP #1: 10/25/13. EDD: 06/18/14. Confirmed MC: 11/06/13.
BFP #2: 3/31/14. EDD: 12/2/14 Born: 12/9/14
BFP #3: 10/5/15 EDD: 6/10/16 Born: 6/13/16
BFP #4: 8/20/15 EDD: 4/26/18
Re: CD stash for 2 under 2
Unless you have huge babies, most likely you will need newborns. My guy was 9lbs 5oz!! The good thing about newborn is that since they are barely used, they have pretty good resale!!
1. Do you want to wait until LO fits in one-size? If so, do your math. Your first will probably be 21 months by the time your second fits into them. Washing every other day do you go through all the diapers? If so, and if you want to keep washing every other day, you'll need to double your stash knowing it's temporary OR scrape by and wash every day until your oldest potty learns.
2. Do you want to CD your newborn? If so, you could get covers and prefolds pretty cheap and see how your first is doing with potty learning by the time LO outgrows newborn diapers. In this case you may end up spending more if you do NB and end up getting more one size (rather than washing more frequently for a bit) but, the initial investment is less and a bit more focused on "let's see what happens." As an estimation.... Green Mountain Diapers Cloth-Eez prefolds size small are $29/dozen. Depending on how big your baby is they may be bulky at first but you could get 3 dozen (or a couple dozen newborn prefolds and a couple dozen small, but it'll be a bit more money) and 10 covers (I love rumparooz nb for $10 each). That's $187 for a nb stash with great resale value after only one child use, and would likely keep you washing every other day for your youngest. You could even do flats instead which are even cheaper than prefolds. Either way, you want 36 changes at least in hopes of washing on the same schedule.
Obviously this has been on my mind! If you come up with an ideal plan please share I'd love to hear what you decide to do!