As an artist trying to grow your business you will undoubtedly need to hire others to assist you at larger gigs, or events that are scheduled at the same time as your current bookings.
Are these artists employees, or independent contractors? There are many financial penalties associated with the WRONG classification. The resource below may provide with an understanding of these classifications.
DISCLAIMER: I am not a lawyer, (or a doctor, or an Indian Chief), so please seek the proper legal assistance if you have questions beyond the information in the document.