Please add a new Subscription same like Admin SE for Unlimited Domains. I'm a developer in Pakistan, india, Philippines, and in here clients don't have budget to pay for the hosting and Plesk license. they only pay $30 - $50 dollars for a complete website including domain and hosting. we can't afford Plesk paid license,
i suggest a new subscription plan with same Admin SE Features but Unlimited domain with the price of $3 - $5,

if we have access Admin SE Unlimited Domain, we can manage all clients websites at one server.