This is an area near and dear to my heart because of the opportunities it represents for immersive instruction, equitable field trip opportunities, hands-on learning simulations, etc... The catch with it is always deciding how much you want to invest in it as there are really two class categories for this sort of tech. The High End category gives a much higher end experience, avoids some of the negative symptoms that some users experience with VR (i.e., motion sickness), and generally have access to much, much more content. Typically, these are better suited in my experience to small group use in design-instruction or maker-space type settings. On the flip side, the low-end costs less and has a much lower threshold for entry with phone apps as the primary medium, offering programs like Google Expeditions, etc. Typically these are better for more students. If you want to give your admin a sense of what would likely be affordable for you to use there rather than the false hope of driving the VR equivalent of a Lamborghini before driving a Prius, I would hedge my bet towards the latter category (for now). 

1. High End - Oculus Rift or HTC Vive route (High end computer required)

2. Low End - Playstation VR (PlayStation 4 required) or Google Cardboard (Smartphone, Router, and probably an iPad tablet required)

The most affordable route into it would be the Google Cardboard.

The other big thing to draw the line between... Are you leaning more toward AR or VR (i.e., overlay of digital upon real environment VS. fully digital environment)? The former is more about computing and design at the moment, or else for games -- There is not a lot currently in AR tech though I REALLY want that to change. The latter, VR, has more content at the moment but tends to suffer from the issue around movement sickness if you do more than ~15-minutes at a time.

Best,

Ethan Kichura