Be prepared to invest more than $250,000 to start a mini train ride business. But also be prepared to generate daily business sales that can easily exceed $1,500. Starting a mini train ride business for children takes a lot of careful planning, research and business expertise, and there are numerous considerations including the most important--where the business will be located. Good locations include parks, amusement centers, indoor malls and zoos. Additionally, depending on the business location, sales of products such as hats, T-shirts and food items can also be added to boost sales and profits.