What are you doing? Aiming at the place, and click planting? I can make that fence in 5 minutes.
Use the numberpad (default I believe) or whatever you use to move the bricks, and make one fence section, then get the duplicator and dup the heck out of the place, cover one side with the fence, dup the baseplate, and go around, and your done. That would take, 5 minutes or so, not 4 weeks. I can build a REAL Fence withen 4 weeks. Man Yo is slow.