WooCommerce Subscriptions

I would like to allow a user to purchase a membership subscription to premium content for a group of people and have a discount at a minimum amount of users. So, say a membership subscription is $200 per year for an individual and $150 per user for a group. I would like users interested in purchasing a membership subscription for their group to purchase a minimum of 5 and add as many users above 5 as they would like. Right now I am using coupons, but it is a clunky process that doesn’t let the user set the membership amount (they have to purchase a pack of 5) and it isn’t clear that a coupon will be used to manage subscriptions or how that process works from the end-user perspective.