I used to spray in Oz, and I agree that it is not job for the low timer. You used to need at least 700 hours (I think) just to apply, then there was about 9 exams to pass before you could even start the course. Then there was the training and the flight test. Admittedly this was with a CASA guy who probably had never been anywhere near a real spray operation in his life, but it still cost money! After that you could go and do it, but real life is much more complicated and it's like ten minutes of happiness and ten hours of smelly, dirty, uncomfortable, DANGEROUS sh1t! Another thing is that you can never get rid of the chemical smells - I used to have a shed where I kept all my Ag clothes. I would change in there to go on a job and shower and change back before going into my house. Even then my girlfiend sat on the other side of the room!
If you want to try it can be great fun, but mostly for the people. The job is the pits.
Zeb