Accommodation in a host family allows you to get the maximum out of your course. Nowhere else will you so directly experience real Spanish life. Nothing could be better to help improve your language skills. The word "family" should not be taken too literally, because your family could also be just a single parent who takes in students because he or she enjoys the company.
You'll enjoy a single room with half board in the home of a Bolivian family.
It is obvious that you will have to adjust a little to the rules of the house. Remember, too, that locals have different eating habits. Apart from that, you are free to do that you want. You will be given your own keys, so you can come and go as you please.