Hi TooBig2Fail,
Studying for the GMAT now - well in advance of when you'll actually "need" your Score - is a really smart choice. With highly-competitive Schools such as Booth, you'll need a strong GMAT Score, a strong OVERALL profile AND you'll need to properly 'market yourself.' Thankfully, you have also given yourself plenty of time to build your overall profile. You might find it worthwhile to discuss your goals with an Admissions Expert. Those Experts should be able to answer your Admissions questions and help define the specific areas of your profile that should work on to help you properly 'fit' with what Booth will be looking for when you apply.
There's a Forum full of those Experts here:
https://gmatclub.com/forum/ask-admissio ... tants-124/Beyond those suggestions, it's also worth noting that many Business Schools view an Applicant's Quant Scaled Score as an indicator of how that Applicant might handle the 'academic side' of the Program - and a score in the Q40 - Q45 won't impress anyone. This is meant to say that by focusing on Quant Tactics, you'll be better able to increase your GMAT Score AND better impress how Business School Admissions Officers will view your potential to handle their respective Programs.
Going forward, you have to be careful about confusing "quantity" of study with "quality" of study. I've never asked anyone to study 30+ hours a week - and while it's great that you might have the available time to study that much, with that number of study hours, you would run the risk of 'burning out' before Test Day (and that is something that we want to avoid). If you are going to try to study that much, then I suggest that you take one hour "off" for every two hours of study. For example, you could study for 2 hours, then stop for an hour, then study for another 2 hours, then take an hour off, etc.
Once you've taken one of the Official GMAC CATs, you should post back here (or you can feel free to PM me directly). We can then discuss the results and how you might adjust your studies going forward.
GMAT assassins aren't born, they're made,
Rich