Starting in 1 month

Greetings everyone!

I can start by apologize the long post I will be making.
About me, 25yrs old, 4th year at a univerisity in Sweden. By general I am very strong in Q, not in verbal, particular not in english. Although toefl wont be a problem for me.
I just found my desire to enter ibanking, and I need a good ug degree for that, which I dont have. Thats why I am aiming for a 1-yr MSc Finance in the UK, and because of that I need to take the GMAT.

I haven┬┤t started studying for it yet. I have about 1 month left on this semester, but after that I have around 10 weeks of free time.
I have spent around 4 hours today, reading about GMAT and mostly reading old posts here. Best board I have found so far.

So, now to my questions and options. First, I got to time to study and the $$$, thats why I am thinking about attend some Kaplan classes in the US. Thats going to cost me around $4,000 in NYC for 4 weeks.(I would see this as a vacation too, but my english needs to improve)
Would this be a good idea or would you recommend me something else?

~Keynes