The first time that you do one, it will take longer. However, they get progressively simpler each one you do. I can knock most out, even the larger stations, in about 20 minutes (plus 15 minutes reporting if I do it later, 10 minutes extra if on site). That being said, the bonus should cover your extra time, you will now have done one, and now you'll be able to self-assign so you will recoup the investment many times over. I find they are great fillers, cover my costs when I have to go out of my regular area, and there is really very little narrative.