Living at uni gives you the full experience, and it'll be easier to access the lecturers and library etc, but it will get lonely.
Depends how important saving money is for you.
Have you submitted your UCAS application? What are the specific universities and courses being considered?
So much misinformation above...
If you enjoy clubbing/drinking then move out for Uni. When people talk about the "Uni experience" of living in halls, they're referring to the sweaty moshpits of drunk students in cramped bars/clubs. If that appeals to you, then move out.
If you don't enjoy clubbing/drinking then stay at home. People will say "you won't make friends" or "you will miss out on the experience"; both of which are untrue. You can still join socieities and make friends through your courses.