I worked for 3 years as aerophotographer in Switzerland for a company wich sold this pictures. My camera was a Linhof Aerotronica 6x9 with 400 ASA Color film.
After 2 very dangerous situation with the helicopter I dicided not to do it longer after the 3. year. I also was frustrated at the time and almost loosed my happyness about photographing so it was time to stop. I was finishing my pro career after this, since I did some parttime shootings for mags and newspapers and stil do it a bit and also weddings and portraits, but not fulltime anymore!
Its nor easy to work as pro if you are not willing to do every bulls... in the beginning!
Thats why I'm a happy part timer now!