Hi! Buddy, I am so glad that you finally made this decision.
MBA is not an easy way, and it's tough. Do it by yourself, and I am sure you can pass those stupid examinations with your intelligence and brilliant spirit.
Don't let those who love you down, please show your effort and we are waiting for your success.
I know many people went back to China and studied in new orient in ordrer to get an excellent score for GMAT and TOEFL.
It depends on your budget and how strong your will is. We don't have too much time to waste, and time is more preicous than anything. Make a plan and carry it out, man.