One of my exterior 4 wire HT fences hasn't been plugged in for 2 months. 

I made a thread on here a while back with pictures showing exactly how easy it is to fix the tree falling issue. I own several fences like you have pictured here too. I know what they look like in 15 years. You seem awfully proud of your free fence, but no way in hell will I ever build a 4 wire barb in this situation again.