At first, I wanted to recommend something like the Invincible Rabbit, but then I realized that the owner said she had limited finances~~~
Is the owner a college student now?
If you're a student, you can forget about buying a full-frame camera or something like that, although it's true that full-frame is good.
If you buy a camera, determine your budget first~~~
If you're talking about business needs, it's better to have a higher pixel count. Entry level DSLR would not be recommended. Mid-range to start with, I guess.
What 60D, D7100 ah, and so on. If you have the money, you can consider the entry-level full-frame, what 6D ah, D700 ah~~
To rationalize a little bit of thinking,
is to determine the budget first.
Since it is commercial photography and video advertising, the entry level is not considered, in fact, regardless of Nikon Canon budget determined after the model is so few, find a pixel higher.
Lens, I would recommend zoom, although the photo fixed-focus image quality is better, but taking into account the building to shoot video, or zoom is more convenient.
That's pretty much it.