Yeah but at least they'll have riders. For outrageous costs per passenger mile I don't think anyhing tops the Santa Clara County Light Rail extension to Los Gatos. $175 million for 1.6 miles with a projected ridership of 200 people per day.
Neither project can justify their costs, even on ridership. The revenue from the Honolulu system will be extremely low even with respect to riders, and even if it were not, it’d never recover its costs in construction at that price tag.