Haha...it's for one month, and most of the time we'll be out partying. He has nothing to buy, so he saves up, and I have nothing to buy, so I have a good deal of money. Probably get a third person to tag along, unless it's worthless.
Money isn't really an issue here, except if it's a like a five-star hotel.

Could his guardian allow him to stay in a hotel, even if the guardian isn't present?