Most of the experts use tools such as Invision and Sketch for prototyping. The need to meet face to face is hence done away with. One also has a choice at finding only a Shopify web designer who is nearby his location. But then, a business would be paying up to 100% more for accessing Shopify help by meeting a Shopify expert face-to-face.
For more detail click here: https://www.cyblance.com/shopify/procedure-hiring-talented-shopify-expert/