From the blog "Gregaaz's Bethesda Blogs"

I spent the next week working with Winter to drill down into the Vault-Tec proprietary catalogue. She had a knack for hacking into these systems, and in the process we came up with a lot of ideas for using some of the other Workshop options in unconventional ways. When spring came along, I was pretty confident that I could set up all my new neighbors with pretty comfortable housing in Sanctuary Hills. Indeed, this took care of a key problem with defending the settlement - one person just isn't e