The fact that its a recurring revenue scheme allows them to get bonds based on that income. I think I saw that they were planning to secure $18B for a project when it was $15 for the toll.
Yes though I'd imagine its harder to secure bonds now that Hochul has shown the governor can unilaterally change the fee on a whim, plus new Federal government is antagonistic to the whole program.
Hochul won NY by a fairly narrow margin historically for the state against a pretty MAGA GOP guy. It's entirely possible some more normal blue state GOP type runs against her, wins and reduces the fee further.