steel

This is actually 8  panels made of   3 inch across  steel pipe and heavy steel  wire , 43 inches high , when joined together makes a 22 x 30 ft square pen, this was originally used at county fairs as holding pen, there are 5x5 inch steel plates at the bottom of each post so it could be bolted...

could you guys tell me which you prefer and why. let me know some of the pros and cons like price, life of the post, strength, etc.....

I am going to put up a 10 foot fence using galvanized fence posts. How deep should they be drove into the ground and what size pipe is best for a 10 foot fence?