After Nita's return, the peridexis gives the train a break on the 2nd of Grasshopper, only to ask this the night of the 3rd:

What does it cost for you to take care of your Voidtreckers? Every spell has its price, as I well know, but what is the equivalent for you? What resources do you have to spend, to acquire regular supplies, new carriages, or to update the Safety Control Apparatus augmentation devices? And - are those resources finite?

There's a note of worry at the end there, rather than accusation - juuust a little note, though.