It is hard to imagine a hobby shop getting inundated with phone calls but if so, then kudos to your operation....it is really a blessing for the phone to be ringing off the hook. I own a company and we have a customer service staff of 5. Each person can handle about 20 calls per hour or 150 calls per day. Obviously, this will vary from business to business and the nature of the product. However, as a business owner, I would suggest a couple of things:
1)If you don't want or can't provide customer service by phone.....don't offer it. Not a big fan, but many companies today simply don't offer it and only provide online customer service. Nothing is more frustrating to a customer than to call a number you provided, only to be ignored and not get through.
2)Use CRM software. Many have free or lite versions. LiveAgent is a great free app where customer data, questions, problems, etc. can be gathered, tracked, assigned to team members, and followed up on quickly and accurately....I promise it will streamline your operation and help you "keep up with the calls".
Remember, you are not selliing widgets, you are dealing with people and their passions......