You would be surprised how simple it could be. Visit your local convenience store. See all the fruit bowls, sandwich, salads available. Not made in store. Sure a good store will have a grill we’re you can order things and watch them be made. Most product come via a truck, case ready. Open tote, remove products, place on self. You don’t need a kitchen yourself. A place to stage product before and after is a good idea, but you could live life on the edge, and have Right-in-Time truck delivers to your railcar.
It’s doable, it how things gets done in 2019.