|Your nephew might know computer games |
but that doesn't make him a web designer.
Companies need a web presence. They need to have their information available to their customers such as products, services, hours, contact information, ordering, menus, specials, and much more. With a simple site, this might be workable on your own. There is no doubt that software and websites with templates and stock images makes it much easier today than even just a few years ago. But if it is too much, call a professional. If you are looking at e-commerce, call a professional. If you want custom features, call a professional. Just my suggestion.
You might also consider just doing a consultation with a designer. They might be able to help you organize your site plan and make sure you are marketing yourself online appropriately. A few dollars spent up front could save you considerable headaches in the future.
As a small business owner, I know that spending time on building a website will take the owner away from other important aspects of their business. You might be surprised at the cost of a basic website even from a designer. Look at their work, ask their other customers and talk to them about your ideas. Their experience and expertise just might make the difference between success and frustration. :)