Finally, when applying discount factors, where do you intend to get your discount numbers? For a company with existing debt and equity capital you can calculate WACC and use that. For a startup company you need to figure out a risk_adjusted cost of capital that makes sense. Usually this is not just a risk_free rate which only the largest companies in the world have access to. It's probably something higher.
I never have to reinvent the wheel. And as a professional accountant, you can imagine how many different "wheels" I use every day! Profit & Loss statements, Balance Sheets, Cash Flow Forecasts, Time Sheets, Break_Even Analyses, Margin Calculations, Business Plans, etc, etc. When using your own prior work as a financial template, you get another benefit _ you are so familiar with the template that it takes you no time to figure out how to use it. And each time you refine it just a little bit more. So pretty soon your templates run like a Swiss watch! All the bugs have been worked out, you have tested it with many different clients and many different business scenarios and you know you have something you can depend on. Financial Templates as Tools _ For someone who is not a finance professional, financial templates serve a slightly different purpose. They still save time, of course, but they also provide a tool that person would have to pay someone else to develop.