Where I live, I can get an unlimited supply of used power poles for free. I use them for corner posts and one side of my pastures along our road for looks. Everything else was T posts. 400-500 T posts and most of them were put in by having a helper hold the T post while I pushed it in with the bobcat bucket. I got pretty good at it, but would occasionally hit a rock and it would stop or bend if I didn't back off soon enough. When I was about 95% done, my dad called and said lets split the cost of a Danuser T3 post driver. "Thanks Dad, wish you had called last month!". That thing is awesome. For the power poles, I have a hydraulic auger with a 6" bit. Drill the hole, clean it out with post hole diggers, tamp down the bottom and add about 1-2" of gravel. Drop the post in and dump 1.5 sacks of quickmix and about 3 gallons of water and you are done.