I have a presentation on planning a simulation facility that I've shared in the past. https://docs.google.com/present/edit?id=0AWIXhR7XoB1-ZGhkanI3emtfMjFkaGNxcGZmaw&hl=en_US. The presentation is geared toward larger, more complicated projects with lots of parts and pieces. You will likely have a leaner organization, but still have to contend with some of the same issues.
The most important question should be "What do you want to do?" with simulation at your institution and then plan around that.
Let me know if you should have any additional questions.