It's possible. While we can certainly understand their appeal, customizing a ready-made theme can often be a much more complicated task than one would think and in some cases the costs can rival that of having a from-scratch custom design. In general, we design our low cost affordable wesites on top of Premium WordPress Theme authors that have been vetted by the WordPress Open Source community.  These theme layouts are sold on ThemeForest, the #1 Source Marketplace for Premium Website Templates. We can customize premium templates but on the front-end only. We are fluent in html/css which is why our websites look so awesome. Generally speaking, we will not work with older WordPress Themes that have been abandoned by their authors or have not been updated by their developers to work with the latest versions of WordPress.