Can you not use the magical express rather than a taxi?? That would save some money there. I would also recommend bringing peanut butter and jelly in your suitcase and make sandwhiches to help save some money.
Reading this, I understand the post may be fake (imagine that?), but I still had to comment about the above...
No offense intended to the poster, but if I person is so desperate that they have to take peanut butter and jelly in a suitcase to Disney to make sure they can afford the trip, then they don't NEED to be going.