If you're well-versed in working with WordPress templates, go for it and DIY!

But, I've had the best experiences working with professional website developers. Just like people hire you as a consultant, you can hire website developers to consult on your site. 

When I've tried to do websites myself, even with templates, I've wound up frustrated. Not only have I wasted time, but I wasn't able to get the website that I wanted.

Keep in mind that a website is often the first impression someone gets of your business. It's essential that it looks good, has readable marketing copy, and is easy to use. A professional can help make sure this happen!