You could certainly do it with wall outlets and electrical boxes mounted inside the box, but you might want to consider simply building the box and mounting one of those multi-outlet surge protector strips to one side of the box. That would offer you several outlets, a switch, surge protection, and eliminate the need to do any wiring. Many of them come with mounting holes on the back so you can simply put a couple of screws into your box and hang the strip from the screws.