Stable income: Stable

AI-Powered Surgical Planning and Navigation can be a highly reliable side hustle for consistent income as it caters to a specialized and in-demand market. Based on online research and industry trends, individuals consistently earn from providing these services, with a stable demand for such advanced medical solutions. The setup costs range from $5,000 to $10,000, and individuals can typically start profiting within 6 to 12 months. I'd rate it a 3 out of 3 because of the steady demand for these specialized services and the reliable income potential it offers.