Wait, you actually have an empty building/area the size of a typical custom design home? Aren't those typically rather huge? Do you partition the previews?
Why would you assume they physically walk around the entire space instead of teleporting/moving in VR?
It's the Hamptons, these houses are for some of the wealthiest people on the planet.
I'd make them wear a giant visor over their face rather than have to talk to them directly too. They're also some of the most insufferable people you'll ever meet.
The Quest has joysticks to control your position. We managed to get one of our 70 year old clients to figure it out.