Event Registration, publishing & Ticket selling

We have a website on indian artists. We would like to integrate event registration and event ticket selling and event promotion through social networking sites. The site is for indian audience. as you know there are various good websites in the market whcih does event publishing and event ticket selling. we are not big difference to that. We want the provider to suggest a simple design and integrate the same into the existing website. It can be run as a sub domain of the site also. the sale will happen through [login to view URL] will be also a simple administration module. Please provide your proposal and describe the functionalities you will cover and how it will be priced and how long it will take to develop the [login to view URL] a reference check the websites like eventbee, eventbot, eventbrite and bring me the best and simple functinalities that would hold good for a indian ticket buyer. If you can also sugggest a software that we can buy and do some customization, that will be also a great idea because testing overhead will not be there and functionalities will be proven I will share the site details for the potential provider.