In my trade, I've been around tower guys for 31 years. Sure wish I could do it, but no hypnotist has enough of what ever hypnotists have to get me up there.
Watched three guys finish the last 50 feet of a 550 foot tower and then hang a 600 pound antenna at the top in the late 80's. That last 50 feet, hanging the antenna and running the feedline, took two days. I was making $10 per hour to help in the transmitter building (it was an FM station - 94.1 in Jackson, Michigan).
I learned something back then:
If you spend your life pulling yourself up vertically, you start to build muscles that make you someone not to mess with in a bar fight!