Slurry Pit, for those who like a bit of roleplay.
Category: Factories
Factory price: 2500$
Storage capacity:
- Liquid Manure 10,000 liters
Production speed and cost:
- Liquid Manure: 2400 cycles/month ;cost: 0$/month
Many thanks to MISSYB (profile found here on Modhub) for lending me the model to complete this, permission granted.
It creates liquid manure out of nothing to simulate reality because the pit doesn't actually need anything. Therefore, there is no production cost and the process is slow overall.
For the best gaming experience, I recommend placing it in a populated area. A version with a Manure System mod will also be available if you are interested.