1. in traveler theme, you can set the maximum peopel in room and the number of room available.
The extra price will add to total price when user select it but currently, theme does not yet supported set total price in real time. This feature will be available next theme version.
2. Unfortunately, Traveler theme version 2.0 only support Sync Calendar from Google calendar. In next theme version (v2.0.1), theme will supported more system like Airbnb, tripadvisor, homeaway.
3. Thank for your information. We will check and consider to update these new feature for theme in future. Also we are deverloping some new theme for Hotel and Tour…You can check one of our new theme here: http://shinetheme.com/demosd/oceaus/