“Amtrak’s decision not to move to a station adjacent to Miami International airport was based on estimates that relocating its existing station at Hialeah would generate an additional 20,000 riders and $2 million in yearly revenue but would cost $5 million annually to execute, according to information it released in response to a Freedom of Information Act request.”
Florida is too red for that kind of “public good” conversation.
Flying is also still a kind of luxury transportation so this would (to my guess) mostly serve upper middle class vacationers subsidized by locals.
Miami isn’t as red as the rest of the state… they already have a half cent sales tax for the Metromover downtown and that system is not only free to use it’s getting an expansion. A type of SPLOST (Special Penny Local Option Sales Tax) could bring in the monies needed.