All danger and safety issues aside, I just find it an extremely odd thing for a 16yo girl to want to be doing. What I'm probably trying to say is........in the case of a 16yo girl, I doubt it would be money-driven, and the sort of contentment that an older person might find in the solitude/isolation etc with this sort of thing, wouldn't seem to fit a young girl.
I realise it's different strokes for different folks, but the whole thing just seems a bit sort of bizarre in some ways.