Hello, Riccardo.
I got to know you want to update your site with PHP5.5 and Python 2.6 into last version.
for your website update, I am going to use PHP7.3 and Python 3.9, I thinks this is final way to update your site..
and you required to change the site name and logo , it is too simple for me so I can offer this by free.
But to update yoursite requires more money and time.
About this, I hope to discuss about this more detail via chat.
I am really willing to perform this project for you and will provide you perfect result as you wanted.
Valeriya