You could make money doing something you love (or like [or maybe not so much but just really good at]). It's great to see a spreadsheet come together, and usually a lot better than what you originally envisioned. Especially when the dang thing works.
At present, some of the most requested types of spreadsheet packages in the market are: 'Spreadsheets for Small Businesses' and a subset of that: 'Spreadsheets for Actors'.
Apart from these very popular categories, business owners can find various other types of spreadsheets solutions by collaborating with a prominent, reliable spreadsheet-solution-providing company and opt for the 'Personalized Spreadsheet'; solutions that are especially designed to meet your imposed criteria, created from scratch, tailor-made and adapted to your particular needs.
Not dynamic : Data ranges become redundant when new records are added, resulting in established formulae needing to be altered. Overlooking these errors can be embarrassing and downright expensive, especially if important decisions are being made based on the data.
examples of spreadsheet packages
excel inventory templates