I am not exactly sure how the Brightline / FEC / Fortress / Softbank relationships work out. But we can be absolutely certain that the capital costs will be paid by every portion of those companies who extract value from the existence of that infrastructure.
If those 4.3 million trips have a per capita revenue of $60 each, that would mean passenger revenue would be $258 million per year.
Brightline has $3.7 billion in outstanding bonds, and is likely to refinance within a year of the Orlando extension opening, according to an article in
The Bond Buyer.
Apparently, debt service payments over the next five years total $252 million a year on average. And apparently the debt matures in 2049.
Also, Brightline anticipates "$50 million in upfront payments and annual access payments for 30 years starting at $12 million annually" from Miami-Dade County so Tri-Rail can run on Brightline / FEC tracks into Miami.
It certainly is conceivable that Brightline could pay their bonds with the combination of fares and payments from other users of the track.
The Brightline Quarterly Financial Statement from June of this year can be found
here. I am not an accountant, so I would hesitate to say anything with confidence about it. But if someone watching this forum knows more about this stuff, I would love to learn more about what is in this.
I am eagerly awaiting the beginning of Brightline passenger service to Orlando, but I also understand that interest rates aren't what they used to be. So I am not certain about the financial soundness of the service in the current financing environment. My back of the envelope check makes me think it has a decent shot of penciling out, though.