Hello,
I'm an Unity3D expert with more than 5 years experience.
I read all the details about this project and I have few simple questions for the beginning: I see that you attached a [login to view URL] file, did you implemented that in Unity? did you tested it and is working but having issues with performance? what kind of VR glasses do you have (Oculus or Vive)?
I worked more for the mobile devices and, because of that I have enough experience with memory and performance.
I also worked with Oculus DK1 and now I own a Vive VR device, Gear VR and Google Cardboard (only Vive and Oculus are for desktop, Gear VR is for samsung mobile phones and Google Cardboard for all mobile devices).
My price is a little higher than the price which you enter but maybe there is just few hours work. For small projects I usually take 25$/h and for big ones 20$/h.
Best Regards,
Nechifor Marian