Sasuke only used Chibaku Tensei to trap them, what's the point in making it bigger than it needs to be?
Don't get this false assumption that the Juubi's Chakra is limitless, the Juubi itself had to charge his chakra just like Kurama. Even Obito wanted to preserve the Juubi's chakra.
Minato stated when he saw Madara as a Jinchuriki that sense more Sage energy coming from him stronger than Obito. You can't gauge something that is limitless.
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Sasuke stated Kaguya chakra is far beyond Madara.
Why do you think it's limitless when Kaguya was running out of chakra and had to absorb the Infinite Tsukuyomi Chakra again?
Understand, this no baby technique anyone can perform. Former Sasuke when low on chakra was unable to use his Rinnegan, Gaiden Sasuke can still use his Rinne-Swap even when his chakra was lowered.