Pre-Exposure Rabies Vacc

As some of you already know, I've got the internship at the Va Wildlife Center! This is to further my career as a LVT, and possibly move on as a DVM working with Zoo and Conservation! In order for me  to be well rounded and move up in my career; I have to be Rabies vaccinated! The rabies vaccine is about 1000 dollars, for a series of 3.  I need to start this by August 22nd. So if anyone is able to help me Please and Thank you!