1 Happy Value was designed with an eye to cost savings. When your content needs exceed 1 Happy Page, 1 Happy Value is a great next step. 1 Happy Value provides three pages allowing for more room for content, but with an eye toward affordability.
If you want to add the Design Package, then look to 1 Happy Site as an example of a multiple page website with full design. You can also move to the next level anytime, as your business grows. You never lose what you have already invested as each level of website builds on the other.
Enjoy and don't hesitate to send me questions!