What will you be so busy with that you cannot answer the phone?

Customer service is *the* priority when establishing your retail business.

Get a phone set up, get a text/chat system set up, get an email set up, get social media monitoring set up, get carrier pigeons set up ...

The point is, delivering excellent customer service at the start is the only way you will grow. It will be tight for awhile, but you will grow to have a dedicated customer delight team.

Nearly every tool I mentioned above can be run off a single computer; dedicate that as your customer service center and leave it open all day. You can monitor everything as you do other tasks.

Best of luck and let me know if you need more help!
-Shaun