Hi,
I’ve perfectly understood the requirements you mentioned. I’m an expert with Shopify and have been playing with it since it’s launch. I know it's inside out, so no website is complex for me when it comes to design it on Shopify.
Also, I run dropshipping business so I know what you need!
Let me know the further requirements if you have. It would be great if we can have a quick chat to better understand everything from both ends.
Thank you