Hi @madivad,
I must say your implementation is quite complex but if you are not willing to use a plugin to simplify things, another option would be to use the acf/input/admin_enqueue_scripts action to register the custom styles.
This action is limited to pages where field inputs are generated.
You can have a look through the following link: http://www.advancedcustomfields.com/resources/acfinputadmin_enqueue_scripts/