To get beat up that bad, you must be doing something wrong. Between my brother, sister and myself, I haven’t experienced too many of those injuries nor have they. If you are aware of what you are doing you have little to worry about. Yes, working in the elements is not pleasant. As for being lucrative, that was the most money I have ever made without college education. I've been all over the United States and Bermuda. I have had allot of great views and do not regret one moment that I worked on towers. If I did not start a family I would still be doing it. Everyone has his or her opinion though. I say give it a shot. If you do not like it, find something else. Opportunity is everywhere.
Here is a picture from a tower in Bermuda that my sister and I inspected. We spent 10 days there and had a blast.http://img367.imageshack.us/img367/1933/bermuda6rs.jpg