Can't you go through an agency? It would save you a whole lot of work and if you find you don't like the individual for some reason they can send you another

Way easier on you and your mom knowing there will always be someone to look after her. Besides they do all the criminal record checks, all the paper work and handle the $. You probably would spend more money hiring someone yourself and there is no guarantee you or your mom would get along with this person. Then you'd have to start the process again.