There are no charges for buying and exiting the All Weather Investing smallcase. There is a flat fee of Rs. 50 + GST applicable when you invest more, SIP, rebalance your smallcase or Manage (add/remove individual ETF's) in your smallcase
Each ETF also has its own expense ratio, the total blended expense ratio for the smallcase being 0.5%, embedded into your investment - which is its not debited from your end, it is already adjusted in the current value of the ETF's.
Though the Zerodha standard charges would apply as usual.