A cow barn with a conveyor for manure.
Animal Pens is the category.
Cost: $60,000.
Maintenance cost per day: $30
60 cows is the maximum capacity.
You may choose the color of the doors and roof.
Heap of Manure:
Type: Silos; Cost: $5,000
Maintenance cost per day: $10
60000 L is the capacity.
Second Manure Heap:
Type: Silos
Cost: $5,000
Maintenance cost per day: $10
60000 L is the capacity.

Thanks to 750Ti Modding