Meag and Ben Poirier snapped up this 31-foot bus—formerly a prison transport vehicle and a mobile command center for the Sheriff’s Department in Fairfax County, Virginia—on Craigslist for $8,000. Over the next two years, the duo converted the 1989 Chevy B6P into a 165-square-foot home. "Everything from the cabinets and drawers to the bed frame and curtains are fully custom; we made it all from scratch," says Ben.