That said, if some kind soul would give up their valuable time to create a self-propelled sprayer for ModHub(preferably useable by all platforms), it would most likely be greatly appreciated by all. I understand there may be some licensing issues but it doesn't hurt to ask. (Giants could consider it in an upcoming DLC, ya know, if there was support. )
Here's some images to spark some creativity...
Massey Ferguson 9030: