How much is image generation?

Could you please elaborate on the costs associated with image generation? Are there any specific factors that contribute to the overall pricing, such as the complexity of the image, the software used, or the expertise of the individual creating the image? Is it a one-time fee or a recurring cost? Are there any hidden charges or additional fees that clients should be aware of? It would be great if you could provide a general range or a starting point for estimating the cost of image generation services.