If you are interested in making a little money, then this suggestion would not be ideal...
but if you are interested in improving your own spanish, why not try a conversation exchange?
I just got back from studying in Spain and really enjoyed this! I posted signs around the University, and got a lot of feedback. I ended up with about 3 exchanges. We would just meet somewhere (usually a little cafe, or bar), and just talk. The first hour, in English, and the 2nd hour in Spanish for me. I ended up making 3 great friends, in addition to improving my spanish, and their English. Just an idea, good luck!