I love the idea of having like dedicated “farming” cars on the train. Like there can be greenhouse cars where there’s small terrarium like things that can be constantly growing food that can be harvested by hand at first to eat/store and then maybe have it upgradable to be auto stored for easy access (maybe have like a timer on the fruit or whatever is growing so once it’s fully grown if you don’t pick it after so long it goes bad/loses nutrients)
Also, would be cool to add like a paint gun of some kind so you can paint the outside of each train car however we want? Maybe even making it locked behind having to grow certain berries for certain colors?