VT Technologies vtUtilities is out of BETA

vtUtilities provide a local GUI to manage Hyper-V. Hyper-V is supported on Windows Server 2008 R2, Windows Server 2012 as well as on Microsoft Hyper-V Server 2008 R2 and Microsoft Hyper-V Server 2012, which are Microsoft standalone free hypervisor products. vtUtilities allow management of virtual machines, virtual hard disks and networks on both local and remote Hyper-V servers. You can use vtUtilities to manage Hyper-V on Windows Server 2012 and Windows Server 2008 R2 from a single environment. vtUtilities also eliminate the requirement of an additional Windows license for local management of free Microsoft Hyper-V Server.

Cost is $119 per Hyper-V server. No additional cost per VM. So you can have 2 or 30 VM's on a single Hyper-v server and you only pay $119.

Bulk licenses of 10 or more can get you special pricing.

If you want a free way to manager your free core server see pshvm.codeplex.com  a free GUI powershell hyper-v manager project.