I did the CP a million moons ago and the application process has changed a lot so I can’t speak to that.
The CP was definitely not a money making endeavor but it was doable to live on what they paid. I usually worked 5 days a week, about 32 hours but during spring break season, I worked mandatory 6 day weeks for a while. It was not a big deal as everyone is working a lot at the same time. Plus it was the most fun job I ever had so I never felt like I was at work!
I did not have a car and definitely found it totally manageable but if having a car is an option, I would recommend it. I didn’t mind the bus for getting to work but it was kind of a pain for grocery shopping. One of my roommates had a car and she ended up driving us around a lot so if she does bring a car, she should be ready for lots of people asking for rides all the time!
We did get a discount on table service dining (20%) when I was there but like I said that was ages ago. And as princesslindsay said, each park does have a cafeteria. At the start of my CP, I intended to cook a lot and pack a lunch every day but I often ended up working closing shifts so my meal at work was dinner and I got tired of cold sandwiches. In the end, I ate dinner at the Hollywood Studios cafeteria most of the time and found it an affordable and satisfying option. Plus it meant less trips to the grocery store on the bus!
I will say that one of my roommates was an entertainment CM (she was in the Tapestry of Nations parade) and her experience on the CP was a lot different from the rest of my roomies and I who all worked in merchandise, attractions or food and beverage. She worked 6 evenings a week, 5:00 pm to 9:00 pm the entire time we were there because the parade was only offered in the evenings at Epcot. She still loved it and she often got the night off if the weather was not cooperative for the parade and she’d spend the evening playing around Epcot.
Good luck to your daughter!