I urgently need the help of the masters. As a photography assistant, is it necessary to buy a camera to practice?

According to the actual situation of the landlord, I suggest that buying a camera is more helpful to improve my photography skills, but buying a particularly expensive camera, such as Canon 700D and Nikon D5200, can fully meet the shooting needs of the landlord, and the knowledge that photography needs to learn can help the landlord better understand.