There are many systems that will tell you they can be operated in 10 minutes a day - and any experienced punter will tell you this is rubbish. How many races you choose to analyze in a day is up to you, with practice you should be able to do a race in 15-25 minutes. Think about it - betting on the horses should be treated as a form of investment, would you invest in the stock market or a business with only 10 minutes of research?