It kinda depends on several factors when you think about it on how much it will cost. Will you be bringing food, buying some there, traveling by car or bus or train, will you have to buy gas, how many people are staying with you in the hotel and for how long, and then how much you're willing to spend on random anime stuff.
Anyway, just start calculating some of these things and it may give you a better idea.
Then there's how often you're pickpocketed... (just kidding, ^_^)