Wow, that's pretty agressive.

It really depends on your experience. If you've worked enough with oracle, you might be able to take a test a week until you are done.

When I got certified (2 yrs ago) , I had about 3 years experience on Oracle. I scheduled my exams about a month apart and studied REAL hard between them. There is so much stuff on the exams that you might not use everyday. Som exams are really hard and you need those extra hints to get you above the passing grade...