Ploi core packages should have an option to allow specific server plans and/or a monetary limit, otherwise it's impossible to properly sell plans that allow server creation, as users could purchase a cheap plan and deploy a super expensive server.
The monetary limit is also a great option. Let's say we create a package for $100/mo that allows server creation, with a money limit of $50/mo. The customer would be able to create servers in a very flexible way, like 2 x $25 or 1 x $50.
