This achievement can be very hard to get, so here is an easy trick to use to get the achievement!

1) Start up the zombie map "Shi Nu Numa".
2) Play the first round but leave one zombie alive outside the room.
3) Let him tear down the window boards and as soon as he does, board it back up.
4) Continue doing this for about five minutes, until you have repaired two hundred boards.
5) The achievement will pop up, telling you when you can finish the zombies life.

Notes: Do not get too close to the zombie as it can reach in and attack you.
You will not make any money from repairing the boards after a while.

Here is a video tutorial: