There is no one-size-fits-all answer to this question, as earnings will depend on a number of factors including the number of clients you have, the services you offer and your prices. However, as a general guide, most professional foot finders charge between $50 and $100 per hour for their services. Therefore, if you are able to secure just two clients per week, you could potentially earn up to $800 per month from this activity. Of course, earnings can vary greatly depending on your individual circumstances, so it is always advisable to speak with other professionals in the industry to get an accurate estimate of what you could expect to earn.