I have two schools that I know I am very interested in and will be applying to. I am pretty sure I will get an interview invite just fine, but I am considering applying to a safety school or two just in case. However, if I am offered an interview at a school that is not my top choice how long do I have to decide if I will interview there? Can I wait until after I have heard something from the schools I am interested in? I don't mind going to an extra interview, but it is pretty hard financially. My other option would be to add the safety schools in later, but that lessens my chance of getting into them. Any suggestions on how to approach this?