My DD is 20 (almost 21) and works full time but still lives at home. She hasn't travelled with us since she was 18, having spent her vacations with her boyfriend and his family.
We had already booked this year's trip when she decided she would like to come with us. She has paid for her own flight and her park tickets, however we are taking a
Disney cruise during the first week and we have paid for her to have her own SR on the cruise. We will also pay for meals, etc. while in Orlando.
She has very generously offered to pay for her and her little brother to swim with the dolphins in Grand Cayman - I am lucky to have such a wonderful daughter
I am paying for us both to go to WDW for a week next March, to celebrate her 21st. She won't pay for anything on that trip as it is her Birthday gift.