I understand that she is majoring in VP. But I imagine that she has a vision as to what sort of career she is looking at as a “performing musician”.(pop music,MT, opera,church music et al) This sort of career will more than likely dictate whether or not she needs to go to grad school,what skill sets she needs to develop, or where she will have to live and what sort of non music " support career " is feasible. It will help her focus on a secondary major and whether or not a secondary major is even possible. Each possible “secondary support career” is going to impose it’s own set of limitations. So much of the planning hinges on what sort of music performance career she wishes to pursue.
This being said, a music performance major does not exclude any student from the job market. Plenty of non music businesses value the skills attained with intense music study.