Why don't you post a "want" ad and see if anyone has something lying around?

I got some Sidis from Nashbar for ~$60 when I was starting out Keep your eyes peeled for some good deals. Be forewarned: know your size. The sizes between brands vary a bit so make sure you know what size fits you best. Cycling shoes are meant to fit more snugly than regular shoes (I have a thumb's length of space at the top of my running shoes). When I purchased my Sidis, I ordered both sizes I thought might fit me and sent back the ones that didn't fit.

Sometimes if you purchase your bike form a local shop, they will give you a discount on other gear