Stock and hoard, stock and hoard, stock and hoard... buy short sell long...
This photography is a high powered business not for the faint of heart, you have to get in the trenches and dig dig dig for the materials. Don't expect them to fall into your lap. It's your fault if you don't cover all of the bases so get out there and get the scoop on the products and beat the other guys out if at all possible. Remember the only way to get anything off eBay is to snipe it at the last second. Remember one thing; strike while the iron is hot. Buy as much of the stuff as possible and buy a big freezer because the one who dies with the biggest supply of film, paper and chemicals wins.
Wow that was fun, no spelling errors and I felt like a 1930's big city reporter getting the scoop on the poop.