Yeah, not sure how lux their locations are, although very few probably know for sure. Lets not forget the outside does not define the inside. I used to work in an area of northern Mexico. There was this house that reminded me of the compound where they found Bin Laden. The outside looked like crap and it was located in a slum. But once you walked inside, there was nothing cheap about it.
The nice thing is that they have every need tended to. And by that you have to realize that is "every thing". Many have said that they also have accommodations for themselves in other world branches, but I can not offer any evidence of that. In our local circuit, the CO has two apartments. This way he can live closer to where the assignment is for that week. One of the houses is right next to an Assembly Hall (Recently built). He does not even bother to clean any of those places or even cut the grass. Our congos take turns doing the cleaning and caring for the yard. There is a WT Study edition, April 2014. There is a biography there of a man who became one of the many assistants to Knorr. You should read it and see the amount of people that are enslaved to these men for some of the most trivial of tasks.
Funny. the musicians that record the kingdom songs have to pay their way to NY twice a year and record for free, while the CO can not cut their little yard.