Karaoke Machines business. Business Overview Everybody deserves their 15 minutes of fame, and becoming a singing sensation with the assistance of a karaoke machine allows anyone to achieve momentary stardom. Karaoke machines can be rented to nightclubs, the general public, aspiring singers, disc jockey services, and event and wedding planners. start-up costs: Good quality karaoke machines retail for about $2,000. Additionally, you will have to build a music library...