First off, I would buy all legitimate software and hardware and chuck out any rips that I was using. Then I would focus on some market research; I would want to make sure there is a market for my product (you say you have been designing for years, so you may already have the data you need).
Advertising would come next. I would go for my local newspaper or mayby a small magazine with an appropriate readership (mayby a local business magazine, directory, or yearbook). It can be surprisingly cheap to place relatively small ad's in a magazine that has a readership of about 20,000 or so.
There is alot more to this (obviously), and I suggest you get some reading done to determine whats best for your business in your area.