Dont get me wrong, Im an electrician and do many, many service calls where the homeowner thought they could do it and screwed everything up. But the reality is there are many many jobs on military bases that can be handled by the militarty them selves. IE base security. It bug the **** out of me when I drive to Ft Riley and see"contractors" at the gates rather than MP's. When I was in, our squadron turned our "historic" old horse stable building into a pretty nice place with an outstanding lounge with just "self-help". On our own without any outside contractors help. That includes all framing, plumbing, electrical, and drywall and finishing.
Anyone with a Military DL to drive a 5ton is more than qualified to change a dam (yes I know its miss spelled) tire.