A website is not going to be of lasting benefit if you do not update it often, and updating a website requires a Content Management System, or CMS.
I have developed my own custom built CMS which I customise to suit every website I build. It will allow you to change images in galleries, add, delete or re-order galleries and text pages and change the text on text pages. Custom options are built in as required, for instance one of my clients has settings to show or hide Facebook and Twitter links, arrange images into different categories, show and hide pages and several other options.
As you would expect, the CMS is designed in the same way as my websites to be clean, elegant and intuitive to use.