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.
Of course, money spent on a designer will buy you peace of mind because you can leave the designer to it, but you'll have to wait for a space in their (possibly busy) schedule to get the job done. A template, on the other hand, is ready when you are. All you need to do is add your words and images, and customise the site to suit your business's identity. In fact, a template excels here because you can fuse your expert knowledge of your business with the template's professional design.