A non-raider is not going to be able to make money off the crafting part of their crafting profession. They just won't be able to collect some of the mats that you only get in raids, so their only way to get them will be through the AH, and the prices are really insane there, because no guild is going to sell mats they might need down the road. They might sell some to pump up their repair fund or guild bank, but it's going to be costly.

Additionally a lot of the patterns a non-raider will get are going to be common as dirt, so you can't make money off the crafted items realistically, so they're usually only good for personal use or disenchanting and selling.

But, if you're willing to be someone that doesn't care about what they sell, you can say screw the crafting stuff, and make your money selling the mats that only that profession can make. Mooncloth, spellweave, etc. Tailors can always make money on bags as long as they time it right, blacksmiths have rods, leatherworkers.....ummmm I don't know, but I'm sure there's something they have they can fall back on.

So yeah, if you want to make money creating armor, weapons, etc, you have to be a raider, but if you're willing to just use the profession to sell mats, you can make money.

And hey....if worse comes to worse, anyone can make money off fishing and cooking!

Edit: and truth be told, I made more money off selling cooldowns for cloth, and charging people to bring mats to me to craft items than I ever did off my crafted items in spite of having some really awesome gear I could make. Gathering the materials was just too time consuming to consistently craft and make money off the high end stuff. Doing that, price fixing in the AH (buying up items people would undercut me on and reselling them at a profit), and selling on both faction's AHs were the fastest ways I ever found to make money.