If that post is accurate… holy moly those cars are expensive. It doesn't even seem to make sense in rush hour according to those numbers?
He nicely has the exact per-car figure for the newer Caltrain cars ($5.7M / car…); he puts a $2.5M car at ~$162k/yr in depreciation, and $100k/yr in maintenance. If we double the depreciation to account for CalTrain's apparently expensive purchase, that's $325k + $100k / yr per car, or $2.55M/yr for a six-car train. (But: I don't get these depreciation numbers? This figure adds up to ~$13M over the life of the train assuming the 40 yr life in the article, which seems appropriate given that the gallery equipment is nearly 50 IIRC; why would depreciation be more than 100% of the vehicle cost, or is this a "it depreciates faster in earlier years but becomes more cost effective later"? This could greatly make most of the numbers I'm getting here make no sense.)
The passengers, meanwhile, assuming they pay the same price as I do for a Zone 3 pass (and Zone 3 is fairly popular, though some people will travel further to SJ which will cost more…) we get ~$1.6M/yr assuming 100% capacity (570 passengers, n.b. this is less than the current 722 per 6-car gallery, and IDK what Bombadiers have; also I kinda doubt that 100% load will happen in rush, that is, it'll still be >100%) and that they don't raise prices (I also doubt this.) Still, that's a huge funding gap, but should the passengers pay 100% of the required fees, or is some of it expected to come from taxpayers? (There's still a gap of ~$0.9M/yr … per train)