Here is a large automatic Sugarcane farm
The original design comes from NimsTV, but has had some additional components added on. You can place most of this farm underground, just leaving the top part to access the sugarcane. The item elevator shoots the cane up to you and there is bulk storage with light indicators.
https://www.youtube.com/watch?v=fU0kHLLNS30
CREATIONS
MINECRAFT-SCHEMATICS.COM