Kevin Kantola attempts to two viable solutions to the expense of expanding hydrogen refuelling infrastructure for FCEVs.
The first is to build hydrogen powered cars with a high MPGE as according to the Huffington Post, the average new vehicle mpg in 2014 was 24.1. According to FuelEconomy.gov the Mirai receives a combined rating of 66 mpge and the Hyundai Tucson receives 50 mpge combined mileage. This means that right now the commercial fuel cell vehicles are more than 2x as economical as the average fossil fuel burning vehicle. And this is just the beginning as more advances in fuel cell and yes, battery technology will lead to higher MPGe vehicles (and a need for fewer fueling stations).
The second is the cluster model of fuelling stations. According to Kantola “the cluster model simply states that hydrogen fueling stations be placed where most of the population (and customers) are already located.”
In the end he concludes both should be used in tandem, this would maximise the fuel efficiency and convenience of using hydrogen powered cars. See his full article by clicking on the link below.