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.