Hi monmonsta,
To start, since this thread was started by another poster, you might want to start your own thread of posts (so that the conversation can stay focused on your goals and situation). That having been said, here are some notes/suggestions about your study plan:
1) Raising a 450 to a 720+ will take a significant amount of work. I suspect that you'll need at least 3 months of consistent, guided study. Thankfully, it appears that you have given yourself some serious study time, which is good. You might end up needing more time than that though, as you'll have to make BIG improvements to how you handle BOTH the Quant and Verbal sections. That brings us to point #2...
2) You would likely find it most beneficial to study some Quant and some Verbal each week (as opposed to the 'all of one, then all of the other' plan that you've described). You will almost certainly need MORE than a month of study on both the Quant and Verbal sections - and we don't want you to 'lose' any of the Quant skills that you gain early on if you were to focus on just Verbal studies during your second month.
3) Given your score goal, you would likely benefit a great deal by investing in a GMAT Course of some type (either Guided Self-Study or instructor-led).
Now that you've defined your score goal, I'd also like to know a bit more about your broader timeline and goals:
1) When are you planning to apply to Business School?
2) What Schools are you planning to apply to?
GMAT assassins aren't born, they're made,
Rich