Hey, congrats on Columbia everyone!
I was accepted to Columbia as well and I got about $9,000/yr in scholarships. I currently work for AmeriCorps and have absolutely nothing in savings, so I contacted the Dean of Admissions to explain my situation and ask about other funding options. I told her I could not go with so little funding. She agreed to give me another $1,500/yr, however she said funds are beginning to run out so I was lucky to have contacted her early on. I also didn't want to seem greedy, but the reality is, I need to make the most financially smart decision I can about grad school. And for some reason I don't think I was eligible for work study, or at least I didn't see it in the email...
I know in my case, Columbia is the most expensive school I applied to, and even with their great reputation and program, I cannot justify paying $60,000-$70,000/yr in mostly loans. It depends on what you plan on doing with your degree, but we all know social workers don't get paid much, so paying back these loans would take forever, even if you're eligible for loan forgiveness programs.
Sorry I don't mean to sound cynical, and you all might be in a totally different financial situations than me, so I wish everyone luck in their decisions and I hope you are able to secure more funding!