Digital marketing is a great business to start with little or no capital because it mainly requires skills, creativity, and a computer with internet access. You can offer services like social media management, SEO, content marketing, email campaigns, and online ads to small businesses. Many free or low-cost tools (like Canva, Google Analytics, and social media platforms) help manage and measure campaigns. As you build your reputation and client base, you can scale by offering more advanced services or specializing in certain industries.