I'm currently taking the CPA exam myself, and I will tell you that just as the CPA certification is the gold standard for accountants, the CFA certification is the gold standard in the finance world. It's rigorous and takes several years to complete, but most people to whom I've spoken who have pursued it have said it's worth it.
Given that, are you thinking about going to law school first? I, personally, would focus on one or the other for the time being. If you want to go to law school, then go to law school and focus. Then start studying for the CFA after you pass the bar exam. Likewise, if you want to get some work experience (which I think is the better route unless you're absolutely sure you want to go to law school), then go and work for three or four years and save some money.