To answer questions about solar rails, from what I gathered on the wiki.
The first two screen shots on the page should provide some sort of idea what is necessary. First, an Orokin Lab. Next, the first screen shot, which you will have to enlarge the screen, by clicking on the picture, will show the research resources for the rail. The second screen shot on that page details the resources and credits needed for construction per rail. There will be some farming to perform. Hopefully not as much as was necessary to build Zephyr and the 600 oxium per frame.
Even if the rails are not constructed immediately, the resources will have to be obtained.
Sounds like a clan event.