geez! Bet the feral cat population there is out of site!
The Animal Birth Control Clinic here does low cost neuters for $25 & now have a program for senior citizens that catch ferals & bring in done for free. Do require Rabies shot, but it runs around $10-$15.
It would be cheaper for you to fly it down here have it done & fly it back than doing it there!
Check into a low cost clinic somewhere close, most big cities have them.
Debs