Teaching Overseas

A friend has a chance to teach English as a second language in Spain soon. She is wondering if she needs to buy international medical insurance to supplement her US medical insurance while she is there? She is also installing an ADT Security system to protect her empty house while she is gone. These are all unexpected costs of taking an assignment like this and things you should consider and negotiate before you accept a similar position. She is looking forward to the experience, but wants to share this tip. Thanks.