Great question! We suggest using Shopify to build your eCommerce drop shipping store. It's a very user friendly store builder and in our full courses we show you how to setup, maintain and be profitable with a Shopify store. Shopify offers a free two week trial and then it's $30/ month.
Here's the link to Shopify - https://www.shopify.com/
You can see what is included in all of our packages with pricing at this link - https://dropshiplifestyle.zendesk.com/hc/en-us/sections/115001189568-Bonuses-To-Being-A-Member- .
Hope that helps and let us know if you have any other questions, thanks =)