Hello!
My name is Anastasia, Ecwid Support. Thank you for contacting us! I will be glad to help you.
At the moment, there is no built-in option to set the minimum amount of items available for a purchase, unfortunately. However, it is still possible to achieve by creating a custom solution using Ecwid API:
https://developers.ecwid.com/api-documentation. This will require advanced programming skills and knowledge. If you need help with it, you can hire a developer who can do it for you, or send a request to our customization team at
https://ecwidcom.typeform.com/to/vIlijv They will review the task and will be glad to help you, on a paid basis.
As a workaround, you can create a base product and indicate (in the title) that this product is a set of 4 items. With the help of
the "Product Options" feature you can specify the available product options and ask customers to choose any 4 options they want.
You can also specify the minimum allowed order subtotal in your Ecwid Control Panel - Settings - General - Cart&Checkout.
I hope this will be helpful for you.
Please, let us know if you have any further questions.
Best regards,
Anastasia E.
Ecwid Support Team