Finally I got everything working with some cool CSS Grid repeaters, connected to Wix Code Data Collections. It works really nice and you can extend them or design them any way you feel like. All source code included.
See it live in action here: https://www.wixshowcase.com/css-repeaters-demo
You have all source code on that page at the bottom, copy and paste and enjoy. You need the full video course and walkthrough, watch out at wixshow.com for more.