Our team's school has a web design class, so I talked to the teacher about how to set up a webpage. She suggested I use Weebly, Wordpress, or Wix. We wanted something fairly easy to set up and customize. (We're rookies, and we want to get out there) I looked at different templates on all three sites and compared them. In the end, we decided on Wix. We are finishing up the site this week, and I'll post a link when it's up.
I see most teams (at least, on this thread) use Wordpress, and, from what I've seen here, they all look really really good! I've also seen a team (2614,
http://www.marsfirst.org/) use Squarespace, and that looked nice as well.
It's relatively easy to set up one's own team site. Yes, professionally-made sites will look impressive, but keep in mind that your main objective is to give information about your team on a well-organized, well-designed site. Honestly, with so many templates out there, you should be good. Also, mentors and sponsors might help out too if you ask. Don't forget to link other pages (Facebook,
Twitter,
Google+, Youtube, etc.) to your site.