Gem vendors have an assortment of very inexpensive gems that will give you a little boost up. I'm currently at lvl 65 on my Warrior and have a few pieces of gear that can be slotted, and that is what I've done, even though I can get blue gems cut for free, and have a stack of uncuts sitting in the bank... I don't want to waste them on gear I will be replacing shortly. The gem vendors are a perfect compromise.

My main is a 375 enchanter and I've tossed enchants on any BOE gear I put my warrior in, but I don't go looking for anyone to do the BOP stuff. Enchanting is an expensive process and it hurts a little bit everytime I enchant something just to dump it a few days later. I recommend checking out some of the recent posts that WOW Insider has done on gearing up for Kara. Get the easiest stuff you can get your hands on, with the assumption that it is going to go bye-bye as soon as you walk into Kara.

To make up any difference on raid night, just make sure you show up with enough consumables to give those extra well-fed buffs, and battle elixers, etc...

Also, find an enchanter friend or guildie. Give them all of your BOE greens that you get running around the world, you can get several every day just from the daily quests. Ask them to DE them for you so you can save up some mats for enchants. Ask nicely and they might say, "Heck, 12 arcane dust is nothing. I'll just toss that on there for free." If a guildie knows that you're trying to gear up to be an asset to the team, they are likely to be helpful.

Talk to the GL as well, about guild bank rules and how to trade for enchants or gems. Let them know that you're putting in the effort to be part of the raiding team. "Hey, GL, I'm trying to get geared up for Kara, could you give some advice on gems and enchants? Should I get them on this gear? What do you think? Let me know where you want me gear-wise so I can get there." The GL will scratch their head and wonder if Christmas came early. "A guild member who is actually trying to do stuff, and doesn't just want stuff handed over?" They will jump at the chance to help you.