Human chiro. Someone answers asap please... And Equine!!!?

I am looking at becoming an equine chiropractor after first studying to be a human chiro first. Can anyone tell me how long it will take to become a fully qualified human chiropractor? I am looking at doing this in the New Zealand chiropractic college or Palmer college or McTimoney. Also, how much money a year do human and/or equine chiropractor's get?