You don't even need to go that far. You can make good money with a push mower just mowing a couple lawns each day and (up there) I think you can then snow blow in the winter.
It is entirely possible to fly under the radar and make enough money to live ok.
If you're the least bit handy there's all sorts of cash only work that a 14-18 year old doing wouldn't raise any eyebrows, especially if she's been staying near small towns a cash only rent deal for some trailer or shack is also not going to be hard to find.