At approx the 29:44 mark, while Hermione Lodge is looking into the bag of money, one of the packs of $50 bills says "Motion Picture Use Only" instead of "United States of America" as the others do.
If you watch season 1; EP1 they describe Riverdale and show houses and some of the town including railroad tracks and a train depot video that shows this is in the town; however that does not explain why in season 6 when Percival says he is building a railroad station/ rails. It was shown that there was one railroad track infrastructure and depot on Ep1, plot hole for season 6, however they say he's building one in season 6.