Hi Rex.
With your expertise, and the number of guys in your neck of the woods wanting GO parts all the time I reckon a small do it yourself web site woud be fantastic for you. There are plenty of companies offering simple 5 - 15 page sites that you can put together and edit yourself, with no more computer experiance needed than posting text and pictures on here.
I used Vista Print, an international company for my do it yourself site. Cheap, effective, and I would say after 6 months that 70% of my business either comes directly from, or is refered to me by web site visits from customers, old and new.
I am in a similar situation where I work a full time job (shift work) and the business I run on the side pays for all my racing and a little bit more on a good month It's still fun at the moment, but I do know where you are coming from after running other businesses in the past. If it's not fun anymore, then it's time to move on