Since this post seems to be getting some reads still, I thought I would offer an update. If anyone who looks at this post is curious as to what I decided, here it is.
I looked at Kaplan, Princeton Review, Barron's, Manhattan GRE, etc. test review books at Barnes & Noble. Some of the strategies they suggest for answering questions were helpful to me, and some were not. I think you all are probably correct. If one has enough self-motivation and isn't an extremely weak student in any subject area, they can study on their own for much less money. There is enough material out there that this can be done. Find what works for you, memorize vocab. lists, take practice tests. It's still not cheap to study effectively for this test on your own, especially if you end up getting a private tutor. (Unless someone will tutor you for free. Lucky you.) Books are anywhere from $20-$50, as an average, and you will need a lot of them for practice and reviewing.
I, however, need tutoring for the Quant. section. Anyone who would offer to tutor me for free is crazy.
Kaplan lets you take the classroom course for free when you buy a tutoring package, so I will be negotiating with the Parental Fund to sign up with them. I used some Kaplan material for studying for the LSAT and it helped. I still think, though, that Kaplan's and Princeton Review's books are too simple once you've gotten pretty far in studying. If I'm not totally burned out by the end of the course and tutoring, I plan to work a lot of practice tests and ETS material, work through the NOVA math, Manhattan Verbal, and memorize Barron wordlists. I'm viewing the Kaplan course/tutoring as a foundation for further studying. Something I need since I'm not a good test taker.
There it is. Thanks to everyone for their advice.