Hey I'm Liam, a UK based .net freelancer.
I have tackled VR projects within Unity before (examples available on request), truth be told VR projects are fast to put together in Unity with the available SDK's for cardboard/Samsung/occulus.
What input system were you hoping to use for the game/demonstrator?
I estimate one days labor for this project with a second day for client requested changes.
Looking forward to hearing from you,
Liam Griffiths.