I have not used the standalone (and free) product, Microsoft Hyper-V Server 2012. Initially I thought this was the installer for Hyper-V on an existing Windows box, but as I understand it, it's a hyper-visor itself (has mini host OS).
Since you cannot add roles and features to this standalone server, can you run a VDI? (with RDS etc.).
My issue is that the VDI requires a domain to join to, and if this server is standlone and has no domain in it's network, can it provide the domain services to do so? I'm running a VDI on a single machine, which also plays the AD DC role for my AD needs.
Are there other things that may prohibit the standalone from being a proper VDI? I am assuming that this standalone is like a Server 2012 Core + Hyper-V role and does not allow other roles.