Hello
Actually, We are having difficultly to get your exact query. In our developer documentation, we have mentioned all the hooks and filters that you can use to modify the content of different templates.
Please refer to the given link for the developer documentation : https://wptravel.io/documentations/developer-documentation/
The content of the section that you have mentioned i.e price, gallery can be controlled from the back end but if you are willing to modify the layout of the tabs, we are unable to suggest you as in worst case, it can cause some fatal error.
To make the changes in the core plugins files, you can consider hiring a professional developer : Please refer to the given link to hire a professional developer : http://wptravel.io/hire-our-customizer
Also, please note that all the changes that you make are in the child theme and not in the main plugin/theme file as, on update all the changes will revert.
If you face any problem while following the developer documentation, feel free to write back to us.
Best Regards!