Thank you for waiting.
I will reply your questions below:
1. About ‘payment mode in the hotel’, our theme do not support currently. You only can ON/OFF in Traveler Options -> Payment Options.
2. i am not sure that i can understand this question. The theme support backend-editor for administrator and frontend-editor for partner.
3. The customer can not access the backend system, so can not integrate a comment box in the backend.
4. You can change the filter by price in the top filter bar. If you need to set to order by price, you need to cusomize it. So, you can give me your account (ftp + admin wordpress). I can help you.
And, you can not order the hotels manually.
5. You can try to save first time then you sort again. I think it will work.
Sorry because currently we do not support custom service because we are focusing to complete the theme