Startup cost: $50 - $500

Low-end estimate: $50, High-end estimate: $500, Explanation: The money for this side hustle would go towards purchasing customizable invoice templates. On the low end, someone could get started with basic, free or low-cost templates available online. On the high end, investing in premium, professionally designed templates or hiring a graphic designer for custom templates might be preferred. Essential expenses include any costs associated with template customization or software to manage invoices efficiently. Optional expenses could include branding services to align the templates with the business's visual identity. There are typically no hidden or recurring fees for this type of side hustle. The cost tends to vary based on the level of customization and quality desired.