A quick Google shows that a Tesla supercharger installation is about $250k including the power grid infrastructure upgrades needed. The self contained hydrogen generator and fueling pump from H2 is about $2 million, but it's also interest free and can be paid over 30 years and the profits of it go to the operator, which isn't true of the Tesla superchargers.

Larger and more popular gas stations can do about half a million in revenue per month selling gas, which they only have about 2% margin on. Hydrogen has the electric cost eating into margins, but even then it should be pretty profitable and much much higher than 2%.

Although it's a big up front cost commitment, the economics definitely seem feasible if hydrogen fuel cell cars start getting more popular over the next decade or more.