On day 1 i was back in the hotel by 2pm day 2 around 5pm but your wife will probably join you on day two as you get taken on the tour and on day 3 i was back there by 5:30, thats if you do the medical on day 3, some guys run out of time so they do the medical when they go back home.
Wife's are invited to join the tour on day 2, they were asked to be at the Emirates center by 11am. Which villa and apartment they show is i think a lucky dip of what is free, the apartment was located on Shiekh Zayed road which is probably the busiest road in the world!! The apartment was furnished the Emirates way so not much in there. The villa was enormous and didnt have any furniture.
Hope this helps