I used to work in web development and I cannot tell you how much I detest Shopify and its incredibly outdated scripting language. It's an awful product to work with. Customers used to come in with their Shopify site which they now outgrown and wanted it upgraded, and it was always easier and therefore cheaper to just throw the entire mess away and start again from scratch.

So seriously if you want to do well in business don't start with a Shopify site, just get something custom from the start, it'll end up cheaper in the long run.