In addition to bdial's comments, you also need film, and that's not for the faint of wallet, either. I just made an 8x10 pinhole camera and in looking at film found some sort of conspiracy. The big names sell 25 sheet boxes which approach 3-digit numbers. The house brands that sell for maybe half the per sheet price seem to package in larger quantities, so the "entry fee" is still around or over $100! (That's why this year I'm doing paper negatives!)