Any cheap and good recommendations of Diapers brand?

I don't have other brand recommendations, but you could consider buying from Shopee! The key is to take note of when the products you need go on sale, then stack discounts with their promo codes, credit card discounts and/or vouchers redeemed with Shopee coins :) I've bought a carton of Mamypoko XL diapers for $32.20 before, the price is the same for all sizes so the smaller the size, the cheaper it is since it'll have more pieces - if it's size S, $32.20 for 200 pieces is only $0.161/pc!