Alam ko ang stress na yan, mama, underweight baby plus eczema plus tight budget is really overwhelming. Honestly, I'd suggest checking with your pedia directly about more affordable hypoallergenic options, because sometimes doctors have samples or know of brands na equally good but way cheaper than S-26, so worth asking talaga. A few of us sa playgroup tried Similac Alimentum (the yellow can) which is also hydrolyzed and pricier but sometimes mas mababa pa vs S-26 depending sa store, or ask din if they can recommend store brands na hypoallergenic since those tend to be gentler sa budget, but your pedia knows baby's eczema best kaya iya na ang best judge. Hang in there, mama, kaya mo yan.