Hajimemashite, Julia san!
JREF e youkoso!
I'm so glad to hear you enjoyed your stay in Japan.
And yes, I can imagine money will be the problem. Air tickets, other transportation fees, accomodations, food and drinks... ^^;
Hope you can make it someday, though.
Also, next time you come here, I'd recommend that you come here in a different season(like, spring or autumn), that'd be even better for you to travel around. It must have been so hot and humid here when you came.
And my best of luck to you on your kanji exam, too. ^^
Have a lot of fun in JREF!
Jaa, mata ne~~~!!
Cue