Where should a Vastu consultant's office be?
The texts define a vastuvid as one who is pure in thought, does good deeds, is virtuous and loves justice. So the office suits the zones that give justice: the West (Shani), the North-East and the East (the Sun). All three are correct.
Related questions
My main door is on E4, yet since moving into this house I have had many money problems. Why?
First check whether the door is in plumb and level with a plumb line and water level, and whether a wall or another door stands in front of it. In this case the entrance was fine; the real cause was a full basement in the South and West portion, together with a problem in the North-East.
Where should a doctor sit?
In the West zone, facing East, so that he can analyse calmly.
Where should a medicine (pharma) office be?
The best places for a medicine office are the East or the West.
A wooden temple with elephant figures stands in the North-East. Is that fine?
Elephant figures should stand on something solid, not hang in the air. The temple can stay, but a temple with elephants is better placed in the West.
Can a mirror be fitted on a wardrobe in the S, SSW, SW, WSW or West?
No. Wardrobe mirrors also belong on the North or East wall. Some say the North-West is also allowed because the mirror represents the water element and the Moon.
During Diwali puja the deity faces South and we face North. Is that right?
No, it is wrong. Seat the deity in the West facing East, and sit so that you look at the deity while your face is towards the North. The Lord's direction is what matters, just as the teacher's direction matters in a classroom.