Can the website ‘design’ be changed after the website is set up?
As often as you wish. The site ‘owner’ simply signs on your web site and uses the web-based tools available on the site to change any aspect of the site.

The site owner may select a new banner, a new MENU button style, change the clubs name and tag line, and change the font type and size of the club name and tag line text, and the colors for numerous elements on the pages.