You are full of questions, aren't you?
Yes, the more roommates you have, the less it costs. I also THINK Vista is Cheaper than the other two. I lived at Vista and did quite well for myself by the end of the week. And cast members are absolutely not allowed to buy or eat food from a dining location while they are in costume. They will get terminated. There are a few places to eat while you are working though. I worked at MK. There was the Mouseketearia, though I'm quite sure I spelled that wrong. It had a Subway, and a couple other food places. It's run by Aramark (not Disney), and I think they gave us a bit of a break on prices, but I'm not sure. There were a couple other places to get food in the tunnels or back stage, but they close early. CP's close the park generally, so those were never open by the time I got to work. The Mouse (cool Disney lingo

) stayed open until two hours before the park closed. However, it is under Fantasy Land, and I worked on Main Street, so it was quite a walk. I would only go there if I had a long break. So basically, I'm saying bring food, or wait til later to eat. My schedule was such a mess down there that I cut myself to one meal a day. I just didn't have time or motivation to cook. But she will probably figure out what it best for her after a few weeks.