My mum used to be one of those volunteers overseas in Costa Rica. She wanted to learn Spanish and decided to go to work abroad. First she attended a Tesol course and after a few weeks she already passed her exam! She worked in Costa Rica for a year and improved her Spanish so fast and speaks it fluently at the moment.
Because she speaks it fluently now, we thought it would be nice to buy one of the amazing Buenos Aires apartments. It's a really great place to spend your holidays in. Till now I only went with my parents, because I can't understand a word of the language, but I planned to learn Spanish and spend at least a month there with my best friends! Cant wait for it actually...