My gram is an independant cleaning lady. She charges $15 an hour. If she didn’t have the job, she probably wouldn’t be able to afford all of the medicine that she and her husband need.
I’d consider an older lady much more trustworthy than a teen, and she’d have oodles more experience. She may also have a greater need for the money than a teen would, even though she may be a little more expensive, she might be quicker and more complete in her work.