Oddly, no one local bit on my inquiries to help me get a computer. I had sent out about ten emails to Craigslist advertisers, and didn't even receive one reply. :-( You'd think that someone would be interested in making a bit of money around here.
I re-read my requirements, and realized that the only part that is way outside of "normal" is the audio aspect; everything else is really pretty vanilla. So, I just posted a job to vWorker, asking for some education on sound cards, microphones and electromagnetic shielding.