No Chris, you can totally get paid for doing video for non-profits. They're just called non-profits because they don't get taxed on profits. It's not like they're poor. The Red Cross totally has money, money you can make with good video. So don't be fooled by the term "non-profit," because there's definitely money floating around in their organizations.Â
  As far as what camera to get: I agree with both Chris and butterflyguy. You want to look professional. No one wants to higher someone who's walking around with something that looks like my grandmom would be using. The DVX100B is a great camera. It's may not be a shoulder camera, but people are still impressed by it. I have a GL2 and people are even impressed by that, and that's only prosumer. The DVX is cheap now too since HD is getting big.Â
Also keep in mind that while the DVX shoots an awesome picture, you're paying for more than a better picture when you dish out $3000 for a camera. You get professional connections, and way more manual controls than any handy cam. The ergonomics are more thoughtful too, I'm sure.  So when you ask, "Would I really notice the difference from a 3k camera compared to my Canon HV20," you have to realize that prices of cameras aren't solely determined by image quality. If I had to guess though, I'm sure the DVX shoots a nicer picture than the HV20. The image just has this nice feel to it...i dunno. You have to try it to know what I'm talking about.Â