No, that's about right. Colombia's in New York City and that helps to make it even more pricey. For the D.C. law school that I was planning to attend, tuition, rent, etc. was estimated at $50,000 a year. At that rate, £50,000 debt isn't too bad. (Relatively speaking...it's still an atrocious amount of debt, but sadly not atypical after a JD.)
maze.e, what were you thinking of studying? And at what level?
Also, don't forget that there are tons of good colleges (in the US sense) and universities that aren't in the Ivy League! I don't think there's the same gap in performance that people percieve in the UK between the top 3-4 and the rest. There's a book called Looking Beyond the Ivy League that may be of interest.... Oftentimes, international students can scoop up some pretty hefty financial aid money (my alma mater is one example where most of the internationals got an incredible amount paid for) at US schools, although perhaps not at the very big names.