Drew Kerr at Working on the railroad reports:

“A new $13.2 million station in Ramsey also opened in early November, and is seeing an average of 130 weekday boardings.”

So we have the capital cost of a commuter rail station at $100,000 per passenger. Note this is more than a car or even a simple house. The park and ride ramp (“ramp” is midwestern for “garage”) has 800 free parking spaces.
Of course if they had the anticipated 800 daily passengers (assuming 1 passenger per vehicle, since this is Amerucah, and one vehicle per space, since why build excess), then the capital cost would be a mere $16,500 per passenger. How much do we spend per bus passenger at most bus stops? Is it even $1?