What your describing is associated with a CMS, however since you’re not handing this off to a client you won’t have as much need to edit things from the front-end like they would. You have access to the designer, which gives you way more editing ability than the CMS could.
If you end up wanting to streamline adding projects, or start posting content within a blog, then you may want to look into the CMS plan. Again, you can add all of these pages as static pages, but you’ll only have a finite amount as @webdev mentioned and trying to manage all of that content without CMS features would be a pain.