The legality of investing in gambling machines depends on the laws and regulations of the country or region. In some places, gambling is considered legal and there is a specific regulatory framework to govern the operation of casinos and gambling machines. In other places, gambling may be completely prohibited or limited to specific forms. If you want to invest in gambling machines as a legal business operation, you need to consider the following points: 1. **Legal Compliance**: Understand the laws regarding gambling in your region, including license requirements, tax regulations, etc. 2. **Market Research**: Assess the market demand in the region and potential competitors. 3. **Regulators**: Work with relevant regulators to ensure that your operations comply with all regulations. 4. **Risk Assessment**: The gambling industry may face high risks, and you need to consider the potential risks of finance and law. 5. **Business Plan**: Develop a detailed business plan, including investment costs, expected returns and operating strategies. If you are considering investing in this field, it is recommended to consult professional lawyers and industry experts to ensure that you get accurate and comprehensive information.