My 17 year old was invited to go stay with a friend and his family for a couple of weeks. They told him that he needs to bring at least $200 because he needs to pay for his own food while he is there.
Okay, I was planning on sending plenty for him for special events, activities, etc...but, i never realized people expect guests to pay "board" during their stay.
When the kids have had friends stay with us, the only things they had to pay for were "extras" like souvenirs or other things they wanted. We even covered events and activities because they were our guest.
I guess this just surprised me.