The original design would have been quite slim and sufficient. However it was basically a straight line and I could not fit a repeater anywhere.
I decided to stack them instead. I thought it would be sufficient to just have two layers but a large amount of the sugar cane falls on the sand and doesn't get pushed, so I added a third layer. Hopefully this will manage a stack each round. Here's the wiring. I don't think birch wood looks good en masse, honestly.
And finishing up the walls...
Quick look at the insides:
And a shot of all the buildings. The rightmost is the unfinished wheat farm, and the bottommost building is the sugar cane farm.
I know that the designs are pretty bland right now. My creativity faded quickly after the tree and cactus farms. Fortunately as I get feed back in the future, I'm hoping it will include ways to make them look better. I also need to update the design plan with an Iron Golem farm, Snow Golem snow farm, wolf and ocelot pens, and something else I can't quite remember at the moment.