This being the case, the primary document or more specifically, the analysis report needed by the company about its expenses, every quarter of the financial year and the details about the unnecessary expenses being made by the departments in the firm can be easily filled in and done by the use of the excel worksheets. This report is called the expenses report. Hence by using the excel worksheets from the office package software; we will succeed in making sure that the report is fully done and calculated properly, with much of a problem.
Also, how long is your investment horizon? Is it really that important to you to project out to 30 years or is 3λ years sufficient along with a terminal value that represents the expected NPV beyond 5 years? Usually this latter approach works best and looks the most credible to potential investors. There are numerous ways to calculate terminal value including multiples, current market values projected forward, and round guesstimates. Obviously these decisions are affected by your personal preference and the type of investment for which you're calculating present value.