Dear Client, I'm shopify designer/developer and setup expert, I can land your hand in this project and feel glad to build shopify website same look and feel of your existing main site! Could you please provide me legal contact info like name, contact, email address so i create shopify website in my partnership back-end, I will show you live demo on each step and Once everything will be done as per your requirements after that i will point your actual domain to shopify platform and you may upgrade to shopify plans. Note you will not be billed while development process means it will lead you to save your cost during in this period :) Looking forward to work with you in this project! Kind Regards, Syed Taqi