Have you ever been a one man Geek Squad? (Of course you have)
scumola: I used to love a small business in my local town that used to do this.  He sold cheap, korean PC hardware and charged by the hour to fix problems for people.  He had a real store front and was in business for at least 5 years before Best Buy moved into town and took his business away.  I think that small companies like this are a dying breed and sorely missed.  I like Best Buy but only because they seem to be the only game in town.  If you do a good job with your little mom-n-pops place, then work will travel around and you'll probably do ok, but the main thing that you need to worry about is losing business to the big-box retailers who do service as a second business.Perhaps advertise using huge signs on the front of your storefront telling people that you're a better Geek Squad than Best Buy or something would help you out.Small car repair places still exist and do well against the dealerships in the automotive industry, but they do it via undercutting the service price and doing a good job and advertising using local media and word of mouth.If you feel like you will get enough clients to support your business, then more power to ya!