I know right! $95,000 for 1 project virtual tour! you can make one tour like that and take the rest of the year off!
But how do you think they've done it, it looks like Vray to me with baked textures brought into Unity or Unreal, and then added some particles like water and fire, maybe real-time reflections?
If it takes so much time to bring something to photoreal level in Unreal, then maybe its better to go with the proven path (vray / corona bake from max and import to real-time).
Anyway, looks like year 2015 is going real-time!
Happy New Year!