Startup cost: $200 - $1k

Setup costs range from $200 to $1,000 depending on the approach taken. At the minimum end, one could start with basic spreadsheet software to create a simple ROI calculator for rental properties. However, for a more comprehensive and efficient setup, investing in specialized AI software or tools tailored for property analysis can cost more. Optional expenses might include advertising to reach potential clients faster. Hidden costs could arise from ongoing software subscriptions for premium tools that enhance the calculator's functionality. Feedback online suggests that while it can be started inexpensively, costs tend to increase as users see the benefits of investing in better tools. For those serious about this side hustle, a budget of $500 to $1,000 would be advisable to cover essential tools and potential advertising expenses.