Dilemma

Northern Illinois University is looking for a catalog librarian. They're looking for a music cataloger, and I'm not one, so I'm not well-qualified for the position, but qualified. The pros are that I could earn a second Master's Degree for free, they have a good cataloging department, I'd love to be a music cataloger, and I'd be closer to Chicago. The cons are that I really don't want to move right now, I'd hate to leave Dorothy in the lurch, and I'd be doing cataloging only. Not certain what to do.