Thought the same thing when I saw this add. Not that it is difficult, if all you are doing is setting the pole, but if you do not have the proper set up to do this work, look out. Don't want to say what the proper pricing is, but if he is looking to pay $20 an hour, the peice rate won't be any better and he probably bid around $200 a pole.
This is CABL.com posting #346717. Tiny Link: cabl.co/mbCmn