Collaborations are a beautiful way to cut across someone else’s following or clientele. She might want to look into that, Instagram ads also work in getting attention, that will mean she has great content already to draw people in enough to make enquires and pay for her service.
We often take word of mouth for granted, its still a very effective way of getting clients and its best when its from a client who has tried your product or paid for your services. Always offer get service so your customers can be your town criers. You can ask they please put in word for you in their circles as well.