Accommodation PHP Script Modification !!

we have the Accommodation PHP Script .. we need some modifications on the script .. 1- Email filtering system , so when the clients chat with each other the email go to the admin to approve for each msg . 2- To display the room photo in the House Rules as description & Amenities. 3- add a contact us page . 4- At booking page, don't send the customer direct for paybal page. because he has to wait confirmation on his booking and after that we will send him link for payment. 5- Listing > Description > Payment method - Drop down : 1- Full payment. 2- Fees only. - Listing > Description > Cancellation Policy - Drop down : 1- Flexible. 2- Moderate. 3- Firm. 4- Strict. 6- add water mark automatically for the pictures uploaded to the listings . 7- check the script coding overall . 8- Make RTL version . Please only programmers with past experience . Thank you .