So, go online and look for network marketing companies that are ready to pay you for your referral services and you will be surprised how easily it can become an online residual income earning business for you. At the same time, you will also get several other benefits that are usually offered by the web development companies such as free template creation, emailing facilities etc.
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.