I am currently a BSN nursing student,but I experienced greek life with my first degree in business management.
This is just my opinion. I probably would not think she would have much time for a traditional NPC chapter if she will already be working as a nurse coming into recruitment. Nursing takes a lot of time especially if she works shifts in addition to the demand that a BSN degree puts on you mentally and academically. There are however BSN undergraduates in NPC chapters everywhere (they just arent working as RN's yet). This would be more feasible for her if she is wanting to do traditional greek life. If she wants an RN in a hurry and decides that earning an associates degree first works best for her, she may want to look into other greek alternatives that are non-collegiate such as Beta Sigma Phi or Epsilon Sigma Alpha.
I wish her goodluck in her nursing career!