What I find to be true is that it's better to be a driven go-getter from a lower ranked law school than a more passive person from a top law school. I went to a top five school and there's really no guarantee that you'll be financially successful because you went to a good school. You need to learn/know how to network and put your nose to the grindstone. However, certainly going to a good school will open more doors for you.
One major advantage that lawyers have over doctors is that you don't need much equipment to practice your craft. These days all you need is a computer, access to Lexis or Westlaw, and clients.