the problem with trains is they are not flexible to change in population needs where buses are. however since this is between two cities it avoids a lot of waste that is inherent in light rail that cities use for metro transit.
the real numbers that matter is maintenance, how is this budgeted for. one of the major issues facing public light rail is the tens of billions in deferred maintenance combined with removing buses because of the cost of paying for the rail.
will this succeed? who knows, they have to convince people that it is worth their time and money to park their car at point A, ride the train to point B, and secure transportation at cost to their destination if it is not close. that is a lot to overcome and the city needs to assist by not preventing ride hailing services and taxis from providing options at both ends as well as making sure if there are local bus services that they do come to the stations