It can't be in a tent maze. It's a permanent installation that has to be constructed in a building, such as a soundstage for instance. It has multiple animatonics and complicated lighting rigs, plus ceiling and high-detail scenic elements. It's cheap, but cheap for an actual theme park attraction, not cheap in the HHN house sense. And yes: Aiello's team does an amazing job with HHN, but they are still temporary mazes ran only for five hours a night in less than a month, with significant downtime.
That said: I don't think it will replace T2 due to capacity. The only reason Orlando would bring it in is to solve the capacity issues that F&F was originally supposed to. Thus it needs to add, not replace. And I think a soundstage is the place to do it.