Risk: High

Starting an AI Audio Book Review and Recommendation Engine from scratch can be quite risky for someone who can't afford to lose money. There are potential risks of losing both time and money as developing AI technology can be complex and resource-intensive. Beginners might end up spending money on training, software tools, and infrastructure without generating any returns, especially if the AI model doesn't perform as expected. There can be significant startup costs for acquiring AI expertise, data sets, and computing resources that may not pay off immediately. Online discussions mention challenges with AI implementation, data quality issues, and algorithm performance affecting profitability. I'd rate the risk a 1 out of 3 because of the high possibility of losing both money and time, particularly in the early stages of setting up and refining the AI technology.