Ftm stash questions

Aja
Due in August.
Currently have 
6 bum genius freetimes (bought new)
16 bum genius 4.0 with extra inserts(second hand)
12 Alva baby newborn with Velcro (new)
A small wet bag
I need a pail
Do you think I'll be okay?
I don't know if he'll fit in the bum genius ones immediately that's why I bought the Alva baby newborns. They were cheap so if he's big it's not a huge expense. I plan to get more freetimes because I like the one piece, and they are adorable
I also bought several newborn disposables in case he doesn't fit in the bum genius that way even if I only use 6 cloth a day it still will help keep cost down