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.
Numerous websites offer sheet templates, either for free download or they charge a small fee. With the free templates, companies or sole proprietors can keep record of more than 1 year. Keep monthly records too. Download balance sheet templates depending upon its features and which operating system it will work with. The templates work with Microsoft Excel and they can be modified according to business demands. Browse through several balance sheet examples to get an idea on how your sheet might turn out and depending on that, choose the sheet template. Alternatively, use online tool Google Docs to upload files and modify it.