Crzycutie, I used 2 quarts of resin, and 4 packets of fiberglass cloth for my suit. At $11 each for the resin, and about $6 each for the fiberglass, in terms of just those materials, it cost me less than $50. However, don't forget you're going to need brushes, mixing containers, and the required safety gear like gloves and a respirator. And this is just for the hardening step.
You'll need Bondo of you want to smooth the parts (not %100 necessary if you don't want to), and then also paints, etc, plus misc. gear such as straps, buckles, padding, to be able to wear it.
I actually have alot of the stuff that i need (brushes, safety, mix) i just need resin, fiber glass, and paint. I got some resin and fiber glass, enough to probably do my helmet. I'll probably just buy more as I get more money and as I find out how much I need.
Thanks you two for being so helpful. =3