Don't forget $2000 to get your ATP. Of course that's only if you're not planning on getting it for free when you upgrade at a regional airline. Since it sounds like you're past the regional airline stage, you might want to invest in it to better your chances.

But if that's the case, then don't worry about the 737 type rating. It's only useful at Southwest, and since they're only planning on growth through 2011, hiring will most likely slow to a crawl or stop before then. (Actually, their hiring already has slowed to a crawl. My buddy got hired at SWA last summer and his class date isn't 'til a year later).

Don't worry about a professional resume service. Anybody can write a decent resume by looking at other good ones. It only takes an hour or two.
Also, don't waste your money on Air Inc. There are other hiring fairs that are free. You may not even need to go to those anyhow.
I used Dauntless ATP test prep software. It works fine. It may not be the best in the world, but you'll still pass with it; I did.