Good evening and welcome back!
Thank you for reaching out to us.
I would love to help you with this topic.
Callie’s solution is pretty awesome. It will work really well, but will not prevent the member from coming back and placing a second order.
To achieve that you will need one quantity limiting WooCommerce third-party plugin.
There are quite a few out there, some free, some not.
You will need to experiment to find the one that suits your needs.
Here are a couple of examples of such plugins to get you started:
- https://wordpress.org/plugins/woocommerce-max-quantity/
- https://woocommerce.com/products/minmax-quantities/
Let me know how that goes.
Best regards,
Geoff B.