Environment Setup (Placing Object in Scene)

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hi there, i have scene with house model where i can walk around the house. the issue is that 

1. i m not feeling like walking around the house.

2. waveVR prefab is at position vector3.zero ( camera as the child)

3. the house model is at positoin 1.6 in y direction (i tried changing the y value lower and higher but did not worked for me). i want to know at what exactly the house model should be??

4. is there any standards for positioning the house model so that it feels like we are in real environment??