If she does have a full time job then I'm almost certain that she wouldn't make as much on VH, let alone more. That statement might have been true back when there was only 10 apartments and she was as active as Misty when she first moved in. Definitely not now.
If Sara is going to be gone most of the day during the weekdays, then the most we can hope for is for her to be more social during the weekends.