Wow, $500. How did you earn so much? What kind of job was it?
You could learn HTML and some PHP, rent out a dedicated server and start creating websites for businesses in your area. You'd have to actually walk up and talk to managers to be more direct, tell them that having a website can increase the amount of customers visiting their business and it gives customers more information regarding their business. If they already have a website tell them you can do better then their previous web service comaany by lowering prices, chucking in a free domain name etc. You could even buy xrumer and do some SEO for the sites too.