Finally bought all the supplies and actually found a pole thanks to a tip from a friend of mine.
Most supplies aren't pictured in the photo, but I bought: 1 bag of quikcrete, 1 drain spade, 1 16 lb. sledgehammer, 1 mixing trough, 1 bucket, 1 trowel, safety glasses, respirators, safety gloves, and three pieces of foot-long rebar.
It's going to be a bitch to dig a hole deep enough for the pole to go in if I use it as is, I'll probably get it cut down to 40 inches on Monday and then do everything either on Wednesday or the weekend. Home Depot doesn't cut metal, apparently. Weird.