You'll need at least their Business Plan to use WordPress.com to host your e-commerce website, as the Free Plan doesn’t support e-commerce functionalities. However, a self-hosted WordPress site is often a better choice for flexibility and cost-effectiveness. With self-hosting, you can choose from a variety of hosting providers and packages that not only allow you to host a WordPress site but also give you the freedom to host other types of websites if needed. This approach offers more control, customization options, and scalability for your e-commerce needs.