Let's be honest about it, whether it's bonded or financed privately, taxpayers aren't contributing any funds to this and it won't be guaranteed by the general fund. It will be paid by user fees on airline tix (~$4.20 per roundtrip ticket) and by the airlines.
The real and only issue is some people just like the airport the way it is. has nothing to do with $$$ or B&M. All of that stuff is just smoke.