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There are many factors. For many people this may be their biggest expenditure. Do you have the desire to work long hours? Are you disciplined to work without someone telling you to work? Do you have financial resources to survive. Most businesses lose money in their first year and some never do. Most businesses fail. Having a business can lead you to financial independence. Are you passionate about the business? Do you have a family and have you discussed your concept. Have you done your research to see competition? There are an infinite number of factors and we could detail hundreds. Be committed.