Perch Runway is good, it's a one time initial cost then nothing further. It's a full CMS website solution where the shop is one of the add-ons (shop.perchcms.com). It's all about full control, you make your site exactly how you like, and host it wherever you want. Look it up and read over the features to see if suits your needs. I built a store with Perch and it was extremely snappy and worked well.

It won't take a day to build, it will take longer, like anything worthwhile.

Don't use Shopify or boring solutions like that if you want full control. Get stuck in and make an original, responsive store!