I don't make a living with video, but I have sold hundreds of videos that I have made. Currently I am working on a pair of Chinese dance shows that I shot with 4 3-CCD cameras. I am editing the items presently using Vegas+DVD. I burn to DVD and sell the videos that way, no longer bothering with video tape.
I have used a number of low end video editors, as well as Premiere 6.5. I haven't tried Premiere Pro. However, Vegas 3.0 and Vegas 4.0 were far superior to Premiere 6.5 in several respects. The real-time rendering was superior. Also, layering of the different camera angles is eaiser.
For DVD authoring, I have also tried a few low end programs, but I was using DVDIt primarily. It did the job ok, but I had problems with stability. Then I switched to DVD Architect (that comes with Vegas plus DVD). It integrates well with Vegas and has some nice features, but it disappoints in an import respect--at least in terms of what I have figured out so far. That is, I want a DVD to start playing when I insert it, but have a menu to refer to whenever the user wants. DVD architect doesnt' really give you this option. So I am considering Pinnacle Impression Pro, but haven't tried it yet.