Most photo artists don’t particularly enjoy the acquisition side of business. This should not come as a surprise – after all, nobody will pay you for the time spent out and about, looking for clients. As a freelancer, customer acquisition via telephone is particularly time-consuming, and can be rough on the nerves, too.
Of course, it would be much nicer if potential customers simply found you and contacted you on their own. A portfolio website can help you with that, always assuming that it appears at the top of search engine listings, in popular photographers directories, and in social networks.