I need to put up an 8 ft deer fence. I would like to rent an auger to make holes 3 ft deep and put 12 ft metal posts into concrete. I would like to use treated lumber but am told that it will only last 10-15 years. The soil here is heavy clay and holds water/stays wet. That is why I am toying w the idea of metal. But I don't know what to use, where to get it or if a metal pole would be strong enough to support it. I plan on putting a 2x2 in square, pvc coated, 16 gauge wire on it. So I don't think that would be terribly heavy? It certainly would not catch any wind resistance at least. It would have shrubs,vines growing on some of it in areas. Does anyone have experience w this type of thing? Please help!