if you can afford it, and you think you're emotionally strong
enough, go for the 2nd option. it offers you more exposure as
you're literally out of your comfort zone, so you have to learn to
fend for yourself and be determined enough not to lose sight of
your objective and get that degree.
else, i don't see much difference between options 1 and 3. it's
just that you might pay more for the 3rd option, that's all.
sounds to me though, that the university in question for the 2nd
and 3rd options is UNSW?