Develop a program having a real time accessibility of database provided by service providers on the website

The programmer will have to develop an internet based program wherein the data entered by service providers i.e hotels will be integrated into the website. The data will carry various information received from the service providers and will be reflected in a similar manner in my website. The programmer has to make an admin panel which will be used by me and also include a sub-admin creator panel wherein I will new sub-admin to new hotels and will refurbish the same with username and password to the new joined hotels. They can change their password of the sub-admin after receipt of the username and password at their end. I can view their details, charges and other things in my admin panel but cannot change the details at my end. The sub-admin panel should be designed in such a manner that one hotel owner cannot view or change the rates or details of another hotel owner. The above details will have similar implication on my website wherein the rooms booked by any other party either offline or online will reflect in the website. The condition should be such that the rooms already booked or used by another individual/corporate/entity will not reflect in the website and only that rooms in a hotel will reflect in my website that are currently available for booking for few days or weeks as uploaded or entered by the hotel vendor/service provider in his sub admin panel. More details will follow after due selection of the programmer who has developed such programs in the past and have submitted the same on time.