Of course it's possible, but it's not practical. Why do you want to live at home? You're gona be racking up debt anyway, just grin and bear it.... if you want to study and get the full experience of studying in cardiff, you're going to have to LIVE there too tbh. If you want to live at home, then study locally...
I would suggest finding your own flat, or moving in with a friend, doing a house share through the uni, or finding a halls that suits you better? There is an all girls one I know here, and some are definitely smaller and more "cosy", which might be better if you're worried about moving out and away. Just some thoughts...