Complete Web Application like makemytrip.com,yatra.com

We want a complete web application to be build using html,php and sql for reservation of railway/air ticket like of [login to view URL] or [login to view URL] please provide the full estimate of this project,that how the project will be done. Will the project require external database from railway authority or we can direct login it through [login to view URL] by some way. if database is required from Indian railways,what's the procedure and how much it costs. The deliverable will be complete website with all queries. Complete information will be provided to successfull bidder.