You'll need to develop good marketing material. Things like demo videos, which you can find plenty examples on YouTube, screenshots, and keyword rich descriptive text help people find your spreadsheet and communicate the value that sets yours a level above the rest. Excelville.com actually allows you to upload your spreadsheet with all of this marketing material in an easily searchable and user friendly website.
Rather than having to go through the pain and suffering of learning a new technology and having to experience trial and error development, the best route would be to acquire the services of a consultant, who can identify your needs and create a customised solution. Obviously, the cost of such a project would depend on the size and complexity of the spreadsheet and your requirements. However, you might be surprised at how cost-effective this project would be.
Size limitation : When a spreadsheet is first constructed and tested, the size tends to be small. However, as the spreadsheet grows with more and more data, it start slowing down, until it reaches that point where your feet go to sleep while you waiting for the re-calculation to finish.
"Spreadsheets for Small Business" is a complete package of ready-made spreadsheets that optimizes and facilitates a series of business processes such as sales exec commission tracking, calculating business expenses and planning budgets. The "Spreadsheet for Small Business" package incorporates valuable programmed spreadsheets such as "Small Business Expense Spreadsheet" - provides accountants and tax-preparers with a complete report on relevant business expenses; "Producer's Budget" - helps users to establish budgets and keep track of their spending; "Monthly Personal Budget" - designed to track daily, weekly and monthly spending for individuals.
spreadsheet templates for tracking
spreadsheet templates for business