Geb has a crib near Lake Tana in the NW.
Hermens has a training camp near Nijmegen. KB and others live there a significant part of the year.
In North America, the largest Ethiopian population is in DC - this was a result of the migration from the famine in the early 80s. they are now realtively well off.
However, as in most countries, the well to do stay. Just like in North America - your average retiree moves 100-150 miles from where s/he worked.
Addis has some wealthy neighborhoods - they are not Greenwich, but they are clearly a place of wealth.
Mansions etc are for face, and Geb would derive no face building a mansion in Mountain View....