Hi Paint, I wanted to post again because everyone, including me, appears to be so negative about your idea. As a disclaimer, let me state that I don't know the first thing about the demographics or competition you'd face in southern Oregon (though some others seem concerned about this). If this is not a significant issue I do believe you can make a go of it.
As has been mentioned, HT will play a major role in your overall volume and profit particularly from full installations. I wouldn't consider an audio only store. Keep your inventory low. Keep your number of employees low. Keep your rent low....though you'll need to be in as high a traffic (population) area as possible and you'll pay for that. Market, market, market. If you're going to go for it, give yourself the best chance to succeed and that means regular advertising, promotions, etc. In other words, take reasonable risks....don't try to stretch the money you have too far. If it fails, at least know you gave it your best shot. Good Luck, Dave