Your business sounds like it is extremely time intensive. In which case I wouldn't spend nearly as much time on a web site as I normally would advise. However I would highly recommend that you get something basic up that people can browse through to see your work and your products.

Additionally, I would suggest you visit the local SBDC office (not to be confused with the site referenced earlier which is not the SBDC). The Small Business Development Centers offer FREE advice to small businesses and to folks wanting to start a new business. They offer classes and seminars and one on one advice from experienced business counselors. They can offer direction to take your business to the next level.