I agree wholeheartedly that a good script and a good performer are the top priorities.
For the script, I'd say keep it simple and straightforward. I'm very much of the "less is more" school of thought when it comes to voiceover. As for finding talent, do you have a community, college or public radio station near you? If so, ask around, or put up a flyer asking for help. Many of those old-school disc jockeys and news announcers have great voices and are comfortable reading into a microphone. If you're lucky, maybe you can even borrow their studio to do the recording, especially if it's a nonprofit/educational kind of documentary.
As for the recording environment, if you can't find an actual recording studio, there are other options. What you're looking for is a room that's as close to acoustically "dead," with no echoes, as you can find. Small carpeted libraries with lots of books on the shelves are great, since the irregularly shaped books act as natural acoustic baffles. A while ago, Douglas Spotted Eagle had an online tutorial about how to make a recording box out of foamcore and acoustical foam. I'm sure you could Google it and find it.
Remember to get the microphone close to your talent. A cheap mike 1.5-2 feet away from the talent, in a room with no echoes, will ALWAYS sound better than an expensive mike 3-6 feet away in a hard, echoey room.
If you are looking to invest in some equipment to help you, I have a couple of ideas:
1. Audio Technica makes a very good large diaphragm microphone, the AT2020, that does a nice job for about $99. You'll need some kind of preamp or mixer and a recorder, or if you have a camera with XLR inputs and phantom power, you can probably record right into the camera and be O.K. AT just came out with a USB version of the same mike [
http://www.bhphotovideo.com/c/produc...CONDENSER.html ]
which might be just the ticket for your needs.
2. I recently picked up a Zoom H4 compact flash recorder for under $200. I'm really impressed with the quality of the built-in mikes. I've recorded some radio documentaries with this unit, and would have no hesitation using it for voiceover work as well.
One last thought: check out "Producing Great Sound for Digital Video" by Jay Rose (Focal Press). It's a great primer on all things audio, including some good, practical, low budget suggestions for voiceover production.
