|Complete No Vacancy||8||Three Horns - Valley (Bounty Board)||791 XP, $55, Assault Rifle or Grenade|
This mission has a time limit that doesn't start until you pick up the package on the roof of the nearby bus. Your objective is to deliver mail to five mailboxes in a little settlement to the south and with a time limit of only a minute and thirty seconds, you'll definitely be pressed for time, especially considering the place is riddled with enemies.
As the game points out to you, this mission is failable, meaning that if you don't finish in the allotted time, then you will have to start over from the very beginning. So, there are a few things you can do to help speed up the mission, with the first one parking a vehicle at the area to the south. Clear it of enemies, then run back north and activate the mission and timer.
The reason you parked a vehicle at the area is because there's a Catch-a-Ride at the Happy Pig Motel. As soon as you pick up the package, run to it and teleport to the vehicle, saving you precious seconds from having to actually travel there. With the enemies dead, all you have to worry about is running around and delivering the packages to the five mailboxes. Once you're finished, the timer will stop and you can go get your reward from the bounty board.