Professional Skill or Once in a Lifetime Experience

as title...
i'm stuck again
within these two

they are the only chance i got this time
+ they are crashing together...
so i can only choose one

now i'll explain what are them actually
Professional Skill : Professional in English Skill + Japanese
once in a Lifetime Experience : Work and Travel to USA (WAT)
so which to choose...
i can only get one of them around june to sept...
since i'm having break around that period

main problem...

for WAT, i need huge capital for that
but, i'll be spending a lot (for sure) before this
it is a must (cannot avoid)
+ if i'm going for this...
i need to get everything done before mid of feb... (excluding visa)
since i won't be available after that

since might not be able to get so much money from dad (+ the spending before)
i'll choose to go to study professional english in full time
+ part time japanese (intermediate level)
3 months... i'm sure i can be really good in english (already proven)
but i'll be going to interns oversea... if i'm going for this...
maybe i can extend my staying there (play for a while)
+ maybe visit to japan again...

so which one to choose? >.<