To retail or not to retail?

Ok not quite Shakespeare but a challenging question none the less. Up until this point I have placed orders based on customer needs and done my best to avoid carrying any inventory at all. The launch of a full function online retail site sends a number of dominos falling; inventory, shipping & receiving, credit card processing, and so forth. Do I really want to cross this bridge? My expensive hobby would instantly become a whole heck of a lot more costly both in time and money. As much as it would be nice to just step into this slowly, it is an all or nothing move. What to do? What to do?