Is it even worth it to do "professional" web design on the side? Will anyone take you seriously when you can only work part time at night and on weekends? How can they when if they want you during the day they have to call you on your "real" job?

Who knows I guess. I am starting up a web site to show my web skills and allow people to request my services. I am just a bit worried about the amount of time I can actually invest in these customers. What route should I take on the site? Creating a business/company feel? Or go straight honest and have the site note that its a part time thing from one guy? I've only done things for friends and family in the past so my business experience is slim to none. However, I do not want to ignore what I think I am good at.