Well if you're good at making templates and can offer people reasonable prices then you should try it. You should first "test the waters" make some templates for people before trying to set up a company and see how it goes. If things go well the company will start on its own.
Good for you. Hope things work out well for you. I've attempted to start doing this but I'm not very good with photoshop yet :PIt is also a lot of work, dealing with deadlines and all that stuff.