I had a friends who commuted to uni cause she lived with her boyfriend in a house.
She became friends as we had our own group on Fb before we met and it was generally the same for the first year. However, because people like me who lived in halls made friends we'd invite other people in the group and she was welcome but because she never met any of our other friends she always felt out of place and would say no. And she was a quite confident person.
But I think if you can make a subject group of fb (it doesn't always work) but it might. It makes it easier. But she did regret working all the time and not going out or she'd often say no cause she couldn't be bothered to stay or she didn't want ask to stay at someone's flat. So if you don't have that bond with someone you'll always feel like you're in the way.
I personally think you'll be at a disadvantage. It's not a bad idea, but I personally dont' see the point of not going to uni and being in halls. Fair enough if you life in the same city, you could save a ton. But personally, I'd want the experience and not feel like I'm missing out. Halls is DEFO full of drama, no matter where you hide, but - the experiences like them will curve your uni experience for the worse or best, you just take it. Life isn't all sweet and dandy. And uni is one of th ebest times to experience your low falls and high jumps. Cause I couldn't imagine being 21+ in a graduate job and you don't know how to react to a face to face argument at work because you've never had to experience conflict cause you didn't stay at halls.
Now I'm not saying halls is where you'll figure out lfies problems, but halls is one the best places to be on how to act and be a responsible adult. You will learn a lot of life tips whilst being at uni halls.