I want to have a website were people can find both train tickets and train holiday packages. For the tickets an API connection with Rome2Rio would be good to start with. Only the train ticket information should be connected. The holiday packages from various agencies should be done by xml feeds. I will start in the Netherlands and later want to extend to other countries. The website also needs category pages / listings, productpages, etc... I want to be able to connect new xml feeds in future. Design and usability will be comparable to kayak.com. However, I will make wireframes to make it more clear. A CMS would also be needed to write content, add packages, etc.