Creating your own word press template is a difficult job especially if you are still a beginner. Luckily, there are tons of ready_made WordPress templates available in the internet. You can download and save them for your internet projects. Nevertheless you must learn and master the skills of creating your own WordPress templates. Why hire a web designer for your page if you can do it all by yourself?
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.