Housing
As far as I know all the expat were transferred to Riyadh in a nice compound called Marvela, even the guys in Jeddah, almost 90% of them, all to Riyadh, I stayed in a Hotel in Jeddah for 1.5 years then the sent me to RUH in Marvela mandatorily.
They tried to offer money instead of accomodation but the process failed because they were offering 400 USD a month only so nobody applied.